Binocular Acuity Research Articles

Evaluation of the impact of binocular versus monocular cataract surgery using Catquest-9SF: a randomized controlled trial.

This prospective, randomized, unmasked, clinical trial aimed to report the visual outcomes of cataract surgery on both eyes versus cataract surgery on one eye in Brazilian patients. This study included patients with bilateral cataracts and binocular visual acuity worse than or equal to 0.3 logarithm of the minimum angle of resolution. The patients were randomly assigned to undergo surgery on one (Control Group) or both eyes (one eye at a time; Intervention Group). Postoperatively, self-reported visual function using Catquest-9SF (primary outcome measure), binocular visual acuity, stereopsis, and ocular dominance (secondary outcome measures) were compared. A total of 151 patients (77 and 148 eyes in the Control and Intervention Groups, respectively) completed the follow-up. Patients who underwent surgery on both eyes exhibited significantly better self-reported visual function (p=0.036) and stereopsis (p=0.026) than those who underwent surgery on one eye. Binocular visual acuity and ocular dominance did not affect the group comparisons. Surgery on both eyes resulted in significantly better self-reported visual function and stereopsis than surgery on one eye.

Analysis of the effects of FineVision Micro F and AcySof IQ PanOptix intraocular lenses on visual quality under different lighting condition

Aims/Purpose: To analyse the effect of the design of FineVision Micro F and AcrySof IQ PanOptix trifocal intraocular lenses on the visual quality of patients under photopic and mesopic illumination conditions.Methods: Observational, prospective, cross‐sectional study. The study was conducted at the Hospital Universitario Sanitas la Moraleja in Madrid. The study followed the principles of the Declaration of Helsinki. The sample included 16 patients who underwent cataract or lensectomy surgery, with bilateral implantation of one of the two intraocular lenses (IOLs) under study: 20 eyes with FineVision Micro F implant and 12 eyes with AcrySof IQ PanOptix. After 30 days after surgery, an assessment of photopic and mesopic, monocular and binocular visual acuity (VA) was performed for three distances: far (4 m), intermediate (66 cm) and near (40 cm) with the ETDRS test. A p‐value <0.05 was considered a criterion for statistical significance.Results: Visual acuity analysis showed significant differences between FineVision Micro F and AcrySof IQ PanOptix lenses, under photopic conditions, for intermediate distance (p‐value 0.014) with means of 0.04 ± 0.05 and 0.11 ± 0.11, respectively and near distance (p‐value 0.001), with means of 0.05 ± 0.06 and 0.12 ± 0.06, respectively. On the other hand, in mesopic conditions, statistically significant differences (p‐value 0.032) were observed in close distance, with means of 0.43 ± 0.3 and 0.52 ± 0.2, respectively.Conclusions: Both FineVision Micro F and AcrySof IQ PanOptix IOL designs provide optimal VA at far distances in both photopic and mesopic illumination conditions. The FineVision Micro F IOL provides better intermediate and near VA in photopic conditions and near distance in mesopic conditions than the AcrySof IQ PanOptix IOL, and this difference is clinically significant.

Pilocarpine HCl 1.25% for treatment of presbyopia after laser vision correction: pooled analysis of two phase 3 randomized trials (GEMINI 1 and 2).

To evaluate the efficacy of topical pilocarpine HCl 1.25% (Pilo) in treating presbyopia in individuals with or without a history of laser vision correction (laser-assisted in situ keratomileusis [LASIK] or photorefractive keratectomy [PRK]). Multiple clinical sites. Pooled analysis of 2 identically designed prospective, randomized, vehicle-controlled studies (GEMINI 1 and 2). Adults aged 40 to 55 years with presbyopia received once-daily Pilo or vehicle bilaterally for 30 days. Responder rates for ≥3-line improvement in mesopic, high-contrast, binocular distance-corrected near visual acuity (DCNVA) were determined on day 30. Among participants with a history of LASIK/PRK (n = 39 in the Pilo group, n = 41 in the vehicle group), responder rates for ≥3-line improvement in DCNVA on day 30 at hours 0.25, 0.5, 1, 3, 6, 8, and 10, respectively, were 16.7%, 38.9%, 41.7%, 37.8%, 16.2%, 13.9%, and 8.3% with Pilo and 0.0%, 2.6%, 10.5%, 5.1%, 7.7%, 2.6%, and 0.0% with vehicle. Responder rates in the LASIK/PRK subgroup were significantly higher with Pilo than vehicle at hours 0.25 ( P = .0087), 0.5 ( P = .0001), 1 ( P = .0022), and 3 ( P = .0005). In contrast, there were no significant differences in responder rates between Pilo-treated participants with and without LASIK/PRK. Among non-LASIK/PRK participants in the Pilo group (n = 336), responder rates for ≥3-line improvement in DCNVA on day 30 at hours 0.25, 0.5, 1, 3, 6, 8, and 10, respectively, were 16.8%, 32.7%, 39.0%, 28.0%, 17.4%, 12.6%, and 10.5%. Pilo treatment effectively and similarly improved DCNVA in presbyopes with or without a history of laser vision correction.

Prospective clinical study of a new intraocular lens with extended depth of focus: ISOPURE, 1 year follow‐up

Aims/Purpose: Monofocal lenses are currently the most frequently implanted intraocular lenses (IOL). New implants with enhanced depth of focus (EDOF) could improve intermediate and near visions with uncompromised far visual acuity and limited dysphotopsia. The objective of this study is to compare Group 1 – a bilateral implantation of an EDOF IOL‐ Isopure® versus Group 2 – a bilateral monofocal IOL – Micropure® – (BVI, Belgium).Methods: Eligible patients with bilateral cataracts were randomly assigned to two groups. Monocular, binocular, corrected, uncorrected, near, intermediate and far visions were measured before, 1 month and 1 year after surgery using ETDRS charts. A pre‐ and post‐operative questionnaire was realized to assess the impact of their vision on daily routine.Results: One year after the surgery near median visions were respectively 0.22 ± 0.18 and 0.44 ± 0.10 LogMar (p‐value = 0.0515) while intermediate visions were −0.02 ± 0.12 and 0.14 ± 0.07 LogMar (p‐value = 0.0595). No significant difference was demonstrated in the binocular distance visual acuities, respectively −0.09 ± 0.14 and −0.12 ± 0.15 (p‐value = 1.00). The study revealed no significant difference regarding sensitivity of contrast and the defocus curve had a larger curve plate of good visual acuity in the Isopure® group. The questionnaire's analysis showed no significant difference between the groups.Conclusions: Although no significant difference was demonstrated, this study suggests that with a larger patient sample, the Isopure® implant may provide better near and intermediate visual activity, since our p‐values are close to 0.05, with the same distance vision and no deterioration of the contrast sensitivity. This implant provides a daily visual comfort and the patients reported a better satisfaction, fewer dysphotopsias, less difficulties with daily activities and less dependence on their glasses.

Reduced interocular suppression after inverse patching in anisometropic amblyopia.

Recent investigations observed substantial enhancements in binocular balance, visual acuity, and stereovision among older children and adults with amblyopia by patching the amblyopic eye (i.e., inverse patching) for 2 h daily over 2 months. Despite these promising findings, the precise neural mechanisms underlying inverse patching remain elusive. This study endeavors to delve deeper into the neural alterations induced by inverse patching, focusing on steady-state visual evoked potentials (SSVEPs). We specifically investigate the changes in SSVEPs following monocular deprivation of either the fellow eye or the amblyopic eye in older amblyopic children and adults. Ten participants (17.60 ± 2.03 years old; mean ± SEM), clinically diagnosed with anisometropic amblyopia, were recruited for this study. Each participant underwent a 120 min patching session on their fellow eye on the first day, followed by a similar session on their amblyopic eye on the second day. Baseline steady-state visual evoked potentials (SSVEPs) measurements were collected each day prior to patching, with post-patching SSVEPs measurements obtained immediately after the patching session. The experimental design incorporated a binocular rivalry paradigm, utilizing SSVEPs measurements. The results revealed that inverse patching induced a heightened influence on neural plasticity, manifesting in a reduction of interocular suppression from the fellow eye to the amblyopic eye. In contrast, patching the fellow eye demonstrated negligible effects on the visual cortex. Furthermore, alterations in interocular suppression subsequent to inverse patching exhibited a correlation with the visual acuity of the amblyopic eye. Inverse patching emerges as a promising therapeutic avenue for adolescents and adults grappling with severe anisometropic amblyopia that proves refractory to conventional interventions. This innovative approach exhibits the potential to induce more robust neural plasticity within the visual cortex, thereby modulating neural interactions more effectively than traditional amblyopia treatments.

Unilateral intraindividual comparison and bilateral performance of a monofocal spherical and diffractive extended depth of field intraocular lens mix-and-match approach.

To evaluate the intraindividual visual performance of a spherical and extended depth of field (EDOF) IOL used in a mix-and-match approach. Single centre (tertiary care centre), retrospective consecutive case series. Included patients had uneventful cataract surgery with implantation of a spherical monofocal IOL (CT Spheris 204) in the dominant eye and a diffractive EDOF IOL (AT LARA 829) in the non-dominant eye. Monocular and binocular defocus curves and visual acuity at various distances were assessed. In addition, binocular reading speed, contrast sensitivity, and patient satisfaction using QOV, Catquest 9SF, and glare/halo questionnaires are reported. A total of 29 patients (58 eyes) were included. We observed significant intra-individual differences for monocular DCIVA, DCNVA, UIVA, and UNVA. There were no differences in monocular BCDVA or UDVA. The monocular defocus curves for the two IOLs significantly differed at defocus steps between -1.0 and -3.5 D. 93.10% of patients reported they would opt for the same combination of IOLs. Excellent uncorrected and corrected distance visual acuity was demonstrated in both groups. The mix-and-match approach described in this study yielded good intermediate vision and improved near vision with high-patient satisfaction.

Comparison of Patients With Emmetropia and Presbyopia and Different Accommodation Who Undergo Unilateral or Bilateral Implantation of a Trifocal IOL

Purpose: To compare visual outcomes and satisfaction in patients with emmetropia, presbyopia, and greater or lesser residual accommodation who undergo unilateral or bilateral implantation of a trifocal diffractive intraocular lens (IOL). Methods: A multicenter, multisurgeon study was performed to evaluate outcomes in patients with emmetropia and presbyopia who underwent refractive lens exchange followed by implantation of a FineVision trifocal IOL (PhysIOL). The inclusion criteria were as follows: emmetropia, sphere −0.25 to +0.50 diopters (D), cylinder less than 0.75 D, and manifest refractive spherical equivalent (MRSE) of −0.25 to +0.25 D. All patients also had to have an uncorrected distance visual acuity (UDVA) of Snellen 0.9 or better in each eye. The sample was divided into different clusters based on two variables: eyes operated on (monocular or binocular) and age either younger than 55 years or 55 years or older. Thus, four possible groups were created. Visual and refractive performance, patient satisfaction, and spectacle independence were assessed. Results: A total of 690 eyes from 431 patients were evaluated. There was no difference in postoperative uncorrected (UDVA) and corrected (CDVA) distance visual acuity between the groups. Binocular uncorrected near vision (UNVA) was better in patients who underwent surgery on both eyes regardless of age (median [interquartile range]: 0.00 [0.00; 0.10] vs 0.10 [0.00; 0.10] logMAR; P < .001). Binocular uncorrected intermediate vision (UIVA) was better in patients who underwent surgery on both eyes aged younger than 55 years than in those who underwent surgery in one eye aged 55 years or older (median [interquartile range]: 0.18 [0.10; 0.18] vs 0.30 [0.18; 0.30] logMAR; P < .001). The efficacy and safety indexes were 0.98 ± 0.09 and 1.01 ± 0.06, respectively. A total of 93.3% of eyes were within the 0.50 D range in postoperative MRSE. Visual dysphotopsia was worse in patients with both eyes operated on, although the differences were not statistically significant. Conclusions: The study shows that after refractive lens exchange, patients with emmetropia and presbyopia who received a trifocal IOL in one or both eyes achieved good UNVA, UIVA, and UDVA. Regarding near binocular visual acuity, results were better for patients who underwent surgery on both eyes than for those who underwent surgery on one eye. Regarding binocular intermediate visual acuity, patients aged younger than 55 years with both lenses replaced had better results than those 55 years or older with only one lens replaced. However, no significant differences were observed in UDVA or patient satisfaction. [ J Refract Surg . 2023;39(12):817–824.]

Head-to-Head Comparison of Intermediate Vision of Two Monofocal Intraocular Lenses.

To compare intermediate visual outcomes in patients previously implanted with bilateral Clareon monofocal IOLs versus bilateral Eyhance IOLs. This was a non-interventional, single-center, examiner-masked, comparative study. Participants were cataract patients presenting at least 3 months after uncomplicated, bilateral implantation of either Clareon or Eyhance non-toric and toric IOLs. Outcomes measures included binocular distance-corrected intermediate visual acuity (DCIVA), binocular corrected distance visual acuity (CDVA), binocular best-corrected defocus curve, postoperative mean residual spherical equivalent (MRSE), and residual astigmatism. A total of 620 eyes of 310 subjects (155 subjects per group) were evaluated. The mean difference in DCIVA was 0.05 logMAR between the Eyhance and Clareon IOLs which was significant (p < 0.01), but within the 0.1 logMAR non-inferiority margin. Mean CDVA of the Clareon group was 0.01 ± 0.03 logMAR compared to 0.02 ± 0.03 logMAR of the Eyhance Group (p > 0.05). Defocus curves from +1.0 D to -3.0 D were not clinically nor statistically different between the Clareon and Eyhance groups (p > 0.05). The results of this study show that bilateral implantation of Clareon monofocal IOLs and Eyhance monofocal IOLs lead to similar distance and intermediate visual outcomes.

Clinical Results and Factors Affecting Visual Function in Eyes Implanted with an Enhanced Monofocal Intraocular Lens.

To compare the clinical results achieved with the enhanced monofocal intraocular lenses (IOLs) with those of the monofocal IOL and investigate factors affecting the distance, intermediate, and near vision. Patients were included who underwent bilateral consecutive cataract surgeries using the same IOLs with follow-up to 1 month postoperatively. Refractions, monocular UDVA and CDVA, and binocular distance-corrected functional visual acuity at 5 meters (BDCFVA), at 66 centimeters (BDCIFVA) and at 40 centimeters (DCNVA) were assessed. Multiple regression analysis was used to assess the factors affecting binocular BDCFVA, BDCIFVA, and BDCNFVA. Subjective symptoms were assessed using the Near Activity Visual Questionnaire (NAVQ) and visual analogue scale (VAS). Sixty patients (120 eyes) implanted with the Tecnis Eyhance IOL (30 patients, 60 eyes) or the Tecnis monofocal IOL (30 patients, 60 eyes) were included. The Tecnis Eyhance IOL provided significantly better binocular BDCIFVA than the Tecnis monofocal IOL in patients under 70 years of age. Multiple regression analysis showed that age was the only factor affecting distance and intermediate visual function in eyes with the Tecnis Eyhance IOL; gender, pupillary diameter, axial length, and average keratometry were not significant. There were no significant differences in subjective symptoms. The comprehensive cohort analysis did not confirm the advantage on the intermediate vision of the Tecnis Eyhance IOL. Younger age may be an important factor to benefit from the unique optical characteristics of this IOL.

The Role of Early Nd:YAG Laser Capsulotomy in Improving Visual Performance in Mild to Moderately Symptomatic Trifocal Patients.

To determine the effect of early Nd:YAG (neodymium:yttrium-aluminum-garnet) laser capsulotomy on objective and subjective visual quality in symptomatic trifocal intraocular lens (IOL) patients. A single-center, prospective study examined symptomatic patients after bilateral cataract extraction with trifocal IOL implantation. A ten-question survey was conducted one month after surgery. Study endpoints included the assessment of monocular and binocular uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), contrast sensitivity (CS), and subjective visual quality before and after Nd:YAG capsulotomy prior to 4 months after cataract surgery. A total of 38 eyes from 21 patients were included with a TFAT00 (n = 23) or TFAT30-60 (n = 15). Overall satisfaction with the IOL was 8.55 ± 1.77 (range 5-10). A Nd:YAG capsulotomy was performed at 55 ± 26 days. Monocular UDVA and UNVA > 20/25 before Nd:YAG were 53.0% and 42.0%, which improved post-Nd:YAG to 63.0% and 66.0%, respectively (P = 0.41, P = 0.051). Binocular UDVA and UNVA >20/25 before Nd:YAG were 82.0% and 63.0%, which increased to 97% and 97%, respectively (P < 0.05, P < 0.001). CS increased in all post-Nd:YAG capsulotomies (P < 0.01). The presence of glare was documented at 74% pre-Nd:YAG, which decreased to 41% post-Nd:YAG (P < 0.01). Glare which limited activities was documented at 24%, which decreased to 5% post-Nd:YAG (P = 0.21). Early treatment of posterior capsule opacities in mild to moderately dissatisfied trifocal IOL patients may be beneficial in improving CS, visual quality, and reducing the presence and severity of dysphotopsias.

Impact of Single Compared to Dual Sensory Loss in People with Dementia on Care Partner Outcomes

AbstractBackgroundBoth hearing and vision loss impact significantly on outcomes in people with dementia as well as their care partners. The study aimed to compare the impact on care partner outcomes of hearing loss alone and dual sensory (both hearing and vision) loss in people with dementiaMethodsThe study sample includes data from the SENSE‐Cog Trial (www.sense‐cog.eu). Care partner psychological distress was ascertained using the 12‐item General Health Questionnaire and the Hospital Anxiety and Depression Scale. Caregiving intensity was assessed using the care partner items of the RUD Lite. Dementia symptoms were assessed with the MOCA, the 12‐item Neuropsychiatric Inventory and the Bristol Activities of Daily Living scale. Vision loss was defined by the presence of binocular visual acuity of not more than 6/9.5 and greater than 6/60 in Snellen metric using the Portable Eye Examination Kit (PEEK) vision tool and visual field greater than 10° using confrontation visual field test. Hearing loss was defined by a bilateral hearing difficulty, indicated by failure of a pure tone hearing screening test in both ears. Statistical analyses included comparison between groups with different sensory losses (hearing‐ vs. dual loss) and regression analyses.ResultsData of dyads of people with dementia and either hearing loss (N = 150) or dual sensory loss (N = 92) and their care partners (female 72.5%; male 27.5%) were considered. Participants had Alzheimer’s dementia (65%), vascular dementia (16%) or mixed dementia (19%), with mean MOCA score 16.6 (range 10 – 28). 73% of patients lived with partner or family and 24% alone. Higher caregiving intensity and higher psychological distress were observed in care partners of patients with dual sensory loss compared to care partners of people with hearing loss only after controlling for the impact of cognitive deficits, neuropsychiatric symptoms, performance on activities of daily living and demographic characteristics.ConclusionsDual sensory loss in people with dementia increases care partner distress and caregiving intensity compared to single hearing loss. Shedding light on sensory loss in dementia may pave new ways towards more effective symptom management and higher quality of life of both patients and their care partners.

Wear Experience with a daily disposable soft contact lens for astigmatism in current wearers of a reusable soft toric contact lens.

The purpose of this study was to evaluate the wear experience of satisfied wearers of a particular reusable toric soft contact lens when refit into a water surface technology daily disposable toric soft contact lens. 30 participants completed the study over three visits. At the first visit, subjects were refit into with their habitual reusable toric soft contact lens (comfilcon A) to maximize fit and vision. Subjects returned after one week and were then refit into the study daily disposable soft contact lenses (verofilcon A) and completed surveys of their initial impressions of comfort, vision, and satisfaction. Participants wore the study lenses for two weeks, and then returned for their final visit to complete a vision and ocular health check. At the final visit, subjects also completed surveys to rate their overall and end-of-day comfort, quality of vision, stability of vision, and dryness using a visual analog scale (VAS). Participants also answered questions about their wear experience with the lenses. Overall median and interquartile range (IQR) of all data and surveys was calculated. Initial impressions of the study lenses revealed a median (IQR) score of 85 (28) for vision, 91 (25) for comfort, and 87 (21) for satisfaction. Overall VAS scores after two weeks of wear found median scores of 93 (16) for quality of vision, 88 (28) for stability of vision, and 91 (20) for comfort. End-of-day median scores were 82(27) for quality of vision, 90 (35) for stability of vision, and 80 (38) for comfort. Overall dryness scores were 20(45) and end-of-day dryness was 39 (46). Median(IQR) binocular logMAR visual acuity with the study lenses was -0.16(0.1). Median rotation of the lenses was 0(4.3) degrees. Participants wearing the daily disposable study lenses for astigmatism gave high scores in vision and comfort both at initial fitting and after two weeks of lens wear. Results showed that satisfied wearers of comfilcon A reusable toric soft contact lenses can be successfully refit with verofilcon A daily disposable contact lenses.

Determination of depression, anxiety, and hopelessness levels in adolescents with refractive errors after the COVID-19 pandemic

Background/Aim: The prevalence of myopia is increasing worldwide especially among adolescents. Changes in living conditions such as reduced engagement in outdoor activities as well as increased activities near the workplace like reading, writing, and screen exposure are thought to be responsible for this increase. Adolescence is a sensitive period of rapid changes in psychological, physiological, and social aspects. Mental health issues such as anxiety and depression are common during this period. During the pandemic, mental health issues among children and adolescents increased due to stress caused by the disease, social isolation, disruption of routines, and the loss of loved ones. With the rapid increase in myopia among adolescents, there is a need to investigate the effects of myopia on mental health. The aim of this study is to evaluate anxiety, depression, and hopelessness levels in adolescents with myopia after the COVID-19 pandemic and to examine the relationship between myopia and anxiety, depression, and hopelessness. Methods: This was a case-control study that included 40 myopic adolescents aged 16-19 with a spherical refractive degree of -2 diopters (D) and above and 40 emmetropic (no refractive error). Participants who had previously undergone refractive surgery, had binocular visual acuity less than 1.0, had strabismus and amblyopia, had a diagnosis of glaucoma, had undergone ocular surgery for any reason, had retinopathy, or had an astigmatic refractive degree greater than ±0.50 were excluded from the study. The study did not include patients with chronic physiological or psychiatric diseases. Both groups were administered the Automatic Thoughts Questionnaire (ATQ), Coronavirus Anxiety Scale (CAS), Beck Hopelessness Scale (BHS), and Beck Depression Inventory (BDI). The groups were compared according to the scales. Myopic degrees were compared with mixed-effect linear models according to scale categories, and the relationship between ATS scores and myopia degrees was evaluated using the Spearman correlation coefficient. Results: The mean (SD) spherical refractive power of myopic adolescents was -3.156 (1.40) diopters; 62.5% of participants with myopia had been exposed to COVID-19, and the anxiety rate in myopic participants compared to controls was 15% (P=0.026). However, no significant difference was found between the myopia and control groups in terms of automatic thoughts, hopelessness, and depression inventory scores when comparing the groups. No correlation was found between the CAS (F=1.098), BHS (F=1.610), BDI (F=1.699), and ATQ (r=0.151) scales and the increase in myopia when we performed linear mixed model analysis and Spearman correlation analysis. There was no significant relationship between the degree of myopia and automatic thoughts, hopelessness anxiety, and depression. Conclusion: The results indicate that adolescents with myopia had higher levels of anxiety after the COVID-19 pandemic. There was no significant correlation between the degree of myopia and anxiety, depression, hopelessness, and automatic thoughts. It is important to monitor adolescents with myopia carefully during pandemics and provide the necessary mental health support. This is because offering mental health support to myopic young people may protect them from potential lasting emotional problems in adulthood during potential future pandemics. It may be beneficial for adolescents to increase their engagement in outdoor activities to reduce myopia and anxiety.

Comparison of bilateral implantation of an extended depth of focus lenses and a blend approach of extended depth of focus lenses and bifocal lenses in cataract patients

BackgroundTo compare the visual outcomes, spectacle independent rate and stereopsis in patients who underwent bilateral implantation of extended depth of focus (EDOF) intraocular lens (IOL), or a blend approach of EDOF and bifocal IOL.MethodsA total of 60 cataract patients, who were scheduled for phacoemulsification and intraocular lens implantation in both eyes in West China Hospital of Sichuan University, were enrolled and divided into Micro monovision group(-0.5D~-1.0D), Non-micro monovision group (< 0.5D) with Symfony IOL, and Mixed group with Symfony and ZMB00 IOLs. Three months postoperatively, we compared the visual acuity, modulation transfer function (MTF), defocus curve, stereopsis, spectacle independence, and photic phenomena among the three groups.ResultsCompared to the Non-micro monovision group (UNVA: 0.07 ± 0.04), Micro monovision group (UNVA: 0.00 ± 0.07, P < 0.001) and Mixed group (UNVA: -0.02 ± 0.06, P < 0.001) showed improvement in binocular uncorrected near visual acuity (UNVA). Additionally, Mixed group exhibited lower MTF10 (MTF10: 0.38 ± 0.24) and point spread function (PSF: 0.192 ± 0.269) results in their non-dominant eye compared to both Micro monovision group (MTF10: 0.56 ± 0.21, P = 0.027; PSF: 0.417 ± 0.282, P = 0.034) and Non-micro monovision group (MTF10: 0.55 ± 0.19, P = 0.038; PSF: 0.408 ± 0.285, P = 0.003). Spectacle independence for near vision were higher in both the Micro monovision (45%) and Mixed (55%) group compared to the Non-micro monovision group (40%). The Mixed group also reported higher incidence of photic phenomena (25%). However, there were no significant differences in stereoscopic function among the three groups.ConclusionBoth micro monovision and mix-and-match methods can help patients to obtain better visual outcomes at different distances. Mix-and-match method has better near visual acuity, while micro monovision method has better intermediate visual acuity. Non-micro monovision methods will affect patients’ near vision outcomes. Binocularly implanted EDOF IOL has better contrast sensitivity.Clinical trial registrationRegistration date:11/07/2023. Trial registration number: ChiCTR2300073433. Trial registry: West China Hospital of Sichuan University retrospectively registered.

Orthokeratology in road traffic – a random sample

Purpose. The German regulation on granting persons permission to drive on the road specifies minimum visual requirements for obtaining a driving licence. The aim of this pilot study was to determine orthokeratology-related diurnal variations in visual acuity, contrast sensitivity and mesopic vision, as well as sensitivity to glare, and to verify compliance with the requirements for obtaining a driving licence. Material and Methods. Ten orthokeratology lens wearers (26.0 ± 7.1 years) with myopia of −2.43 ± 0.97 D and astig- matism of −0.31 ± 0.41 D were tested twice daily (08:30 and 20:30 h) with the Binoptometer 4P (Oculus, Wetzlar, Ger- many). Monocular and binocular visual acuity were tested according to the ISO 8596 and compared with the visual acu- ity requirements for obtaining a driving licence. In addition, binocular contrast and mesopic vision as well as sensitivity to glare were tested in both exams. Differences between the morning and evening examinations were determined using the paired t-test or the Wilcoxon signed-rank test (for non-normally distributed data). Results. There was no statistically significant difference between monocular visual acuity (logMAR) in the morning (right −0.07 ± 0.16; left −0.03 ± 0.15) and evening (right −0.09 ± 0.14; left −0.06 ± 0.17) (p = 0.875; p = 0.353) or binocular visual acuity in the morning (−0.11 ± 0.15) and evening (−0.13 ± 0.13) (p = 0.500). Decimal visual acuity ranged monocularly from 0.63 to 2.00 and binocularly from 0.70 to 2.00. This corre- sponds to the threshold value of an ophthalmological as- sessment for visual acuity of the better eye or for a binocular visual acuity of 0.5. There was no statistically significant difference between the quality of contrast vision in the morning (mean We- ber contrast 11.5 ± 3.4 %) and in the evening (15.5 ± 9.3 %) (p = 0.070), and mesopic vision and glare sensitivity in the morning (both 0.27 ± 0.09 logCS) and in the evening (both 0.27 ± 0.09 logCS) (p = 1.000). Conclusion. Visual acuity, contrast sensitivity, mesopic vision and sensitivity to glare were stable throughout the day in this sample for orthokeratology lens wearers. The requirements of the eye test needed to drive were fulfilled by all but one of the participants in the standard eye test, both in the morning and evening examinations. A more comprehensive eye test was also carried out. This was passed by all test subjects, both in the morning and evening examinations. Keywords Orthokeratology, driving licence regulation, ISO 8596, ophthalmological assessment, mesopic vision, sensitivity to glare

Comparison of binocular visual quality in six treatment protocols for bilateral cataract surgery with presbyopia correction: a prospective two-center single-blinded cohort study

Objective To compare the postoperative binocular visual quality in six treatment protocols for bilateral age-related cataract surgery with presbyopia correction for clinical decisions. Materials and methods In this prospective two-center single-blinded cohort study, participants from North or South China who underwent bilateral phacoemulsification and intraocular lens implantation were divided into six protocols: monovision, diffractive bifocal, mixed, refractive bifocal, trifocal, and micro-monovision extended range of vision (EROV). Binocular visual quality was evaluated at 3 months postoperatively, including binocular uncorrected full-range visual acuity, binocular defocus curves (depth of focus [DoF] and area under the curve [AUC]), binocular visual function (fusion function and stereopsis), binocular subjective spectacle independence rates, visual analog scale (VAS) of overall satisfaction, 25-item visual function questionnaire (VFQ-25), and binocular dysphotopsia symptoms. Results Of the 300 enrolled patients, 272 (90.7%; 544 eyes) were analyzed. The trifocal protocol showed excellent binocular full-range visual acuity and the best performance for most DoFs and AUCs. The monovision protocol presented the worst binocular visual quality in most perspectives, especially in convergence, distance, and near stereopsis (p < 0.001). The full-range subjective spectacle independence rates were sorted from highest to lowest as follows: trifocal (84.8%), refractive bifocal (80.9%), EROV (80.0%), mixed (73.3%), diffractive bifocal (65.2%), and monovision (32.6%) protocols, with no statistically significant differences between the former five protocols (p > 0.05). The EROV protocol achieved the highest VAS and VFQ-25 scores. The incidence of postoperative binocular dysphotopsia symptoms was comparable in all protocols. Conclusions The trifocal protocol showed the best performance, and the monovision protocol presented the worst performance in most perspectives of binocular visual quality for presbyopia correction. The refractive bifocal, mixed, or EROV protocols can provide an approximate performance as a trifocal protocol. Ophthalmologists can customize therapies using different protocols.

The utility of peripheral stereopsis.

This perspective article makes the case for evaluating and training peripheral stereopsis, particularly when the central visual field is compromised in one or both eyes. Examples of clinical conditions that preferentially affect the central visual field include macular degeneration, which affects the central macular region in one or both eyes, and amblyopia where the central field is often affected in one eye, but the peripheral field is largely intact. While binocular acuity may be preserved when the monocular central field of one eye is affected, fine stereopsis is compromised because it requires intact vision in corresponding locations in the two eyes. Even in these clinical conditions, recent studies that map stereoacuity at locations across the visual field demonstrate that the periphery supports coarse stereopsis, and that training efforts to use residual stereopsis may have greater benefit if they take this finding into account.

Medium-term visual and refractive outcomes in patients with pseudoexfoliation implanted with a toric or multifocal intraocular lens.

To report medium-term visual acuity and refractive outcomes of patients with pseudoexfoliation implanted with toric or multifocal intraocular lenses (IOLs). We retrospectively reviewed patients with pseudoexfoliation who had undergone phacoemulsification between 2016 and 2020 with at least 24 months follow-up. Mean follow-up was 44.17 ± 14.95 months. Toric IOLs were implanted in 48 eyes: mean uncorrected LogMAR visual acuity one month after surgery was 0.03 ± 0.09, decreasing to 0.08 ± 0.11 at the last visit (p = .01). Mean refractive cylinder was -0.12 ± 0.36 diopters one month after surgery and -0.25 ± 0.44 diopters at the last follow-up visit, p = .012. Multifocal IOLs were implanted in 42 patients: binocular uncorrected distance visual acuity was -0.02 ± 0.04 one month after surgery and 0.01 ± 0.05 at the last visit (p = .004); near acuity was 0.01 ± 0.03 and 0.04 ± 0.06 respectively (p = .001). In eyes with pseudoexfoliation, absolute spherical equivalent prediction error was 0.22 ± 0.20 diopters for toric and 0.21 ± 0.19 diopters for multifocal IOLs. One month after surgery 68.6% of eyes with toric IOLs and 74.2% of eyes with multifocal IOLs were within ±0.25 diopters of target spherical equivalent and 91.6% and 90.5% were within ±0.5 diopters, respectively. Spherical equivalent did not change significantly during follow-up for either group. Prediction error in eyes with pseudoexfoliation implanted with toric or multifocal IOLs was low and similar to values reported for normal eyes. Postoperative refractive cylinder with toric IOLs was low, with little change during follow-up. Visual function in patients receiving multifocal IOLs was excellent. Therefore, the implantation of these IOLs in eyes with pseudoexfoliation does not seem to cause medium-term problems.

Visual Performance at All Distances and Patient Satisfaction With a New Aspheric Inverted Meniscus Intraocular Lens.

To evaluate visual performance, spectacle independence, and quality of vision of new intraocular lenses (IOLs) for presbyopia correction with an aspheric inverted meniscus optical design (ArtIOLs; Voptica SL) in patients undergoing bilateral cataract surgery. In this prospective study, 60 eyes from 30 patients implanted bilaterally with Art40 and Art70 IOLs were included. These new IOLs were designed with an inverted meniscus shape to improve the peripheral performance and with aspheric surfaces to induce different amounts of negative spherical aberration in each IOL model. Distance-corrected and uncorrected through-focus visual acuities and contrast sensitivity were measured 1 to 3 months after surgery. Twenty-eight patients answered Patient Reported Spectacle Independence (PRSIQ) and Quality of Vision (QoV) questionnaires. Mean monocular (Art40 and Art70) and binocular (Art40/70) corrected distance visual acuities (CDVA) were zero logMAR (20/20). Binocular uncorrected distance visual acuity (UDVA) at far, intermediate (66 cm), and near (40 cm) distances was 0.00 ± 0.01, 0.01 ± 0.03, and 0.09 ± 0.09 logMAR, respectively. Spectacle independence was achieved by 24 (85.7%) patients for far and intermediate vision and 20 patients (71.4%) for near vision. The number of patients never reporting experiencing glare, halos, and starbursts was 28, 27, and 26 (100%, 96.4%, and 92.9%), respectively. The binocular combination of two ArtIOLs models (Art40 and Art70) significantly extended the depth of focus up to at least 40 cm. This combination resulted in a full range of vision with a high level of spectacle independence and without the compromise of halos or dysphotopsias. [J Refract Surg. 2023;39(9):582-588.].

Clinical and Aberrometric Outcomes of a New Implantable Collamer Lens for Myopia and Presbyopia Correction in Phakic Patients.

To assess the clinical and aberrometric outcomes of a new Implantable Collamer Lens (EVO Viva ICL; STAAR Surgical) to correct moderate to high myopia and presbyopia. The study included 80 eyes of 40 patients who had bilateral EVO Viva ICL implantation. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, presbyopic add power, binocular through-focus visual acuity, total ocular spherical aberration (SA), coma aberration, and root mean square of ocular higher order aberrations (RMS HOAs) (i-Trace Aberrometer; Tracey Technologies) for a 4.5-mm pupil size were evaluated. The mean binocular postoperative UDVA and CDVA were 0.09 ± 0.19 and 0.02 ± 0.03 logMAR, respectively. The postoperative spherical equivalent was -0.61 ± 0.54 diopters (D). The presbyopic add power reduced from +1.31 ± 0.74 D preoperatively to +0.44 ± 0.58 D after surgery (P < .0001). The mean visual acuity was 0.1 logMAR or better (20/25 or better) across the vergence range from +0.50 to -1.50 D, better than 0.2 logMAR (20/32 or better) up to the vergence of -2.00 D, and remained better than 0.3 logMAR (20/40 or better) up to the vergence of -2.50 D. The total ocular aberrations induced by EVO Viva ICL were -0.34 ± 0.09 µm of SA, 0.24 ± 0.18 µm of coma, and 0.26 ± 0.12 µm of RMS HOAs. The outcomes support that the new ICL might be a good alternative for myopia and presbyopia correction in patients aged between 45 and 55 years. Further studies are needed to evaluate the threshold lens misalignment from which the patient´s visual quality would be affected. [J Refract Surg. 2023;39(9):589-596.].