Undergoing Cataract Surgery Research Articles

Outcomes and complications of cataract surgery using phacoemulsification in eyes with and without pseudo exfoliation syndrome

Cataract remains a significant cause of visual impairment globally, with pseudo exfoliation syndrome (PEX) posing additional challenges for cataract surgery. This study aimed to compare outcomes and complications in patients with and without PEX undergoing phacoemulsification for senile cataract. A total of 70 patients were divided into two groups: PEX (Group 1) and non-PEX (Group 2). Surgical procedures were performed, and outcomes were evaluated. Group 1 exhibited smaller pupil diameter and higher rates of advanced cataracts and intraoperative complications. Despite similar postoperative parameters, Group 1 showed increased inflammatory response and poorer initial visual recovery. Tailored management strategies for PEX patients undergoing cataract surgery are warranted.

Risk of Age-Related Macular Degeneration in Patients with Exfoliation Syndrome: The Utah Project on Exfoliation Syndrome (UPEXS)

Objective: To investigate any relationships between exfoliation syndrome or exfoliation glaucoma and age-related macular degeneration utilizing the Utah population database. Design: This was a retrospective, case–control cohort study. Subjects, Participants, and/or Controls: We identified 3405 patients diagnosed with exfoliation syndrome (XFS) or exfoliation glaucoma (XFG) during a dilated eye exam within the UHealth system from 1996 to 2021, whose dry or wet age-related macular degeneration (AMD) status was assessed. A population-based control pool of 257,714 UHealth patients with no XFS/XFG diagnosis and a dilated eye exam history from 1996 to 2021 was compiled, with its patients randomly selected and individually matched 3:1 to cases based on sex and age at index diagnosis of their respective case. Methods: A covariate analysis was performed of characteristics and risk factors associated with XFS/XFG, which included race/ethnicity, residence location, partner/marital status, and family history of XFS/XFG, obesity, tobacco use, alcohol use, osteoporosis/vitamin D deficiency, primary/essential hypertension, ocular hypertension, and cataract surgery. Main Outcome Measure: We studied the trends of non-exudative (dry) or exudative (wet) AMD in a large Utah population study of XFS/XFG patients and controls. Results: Of 3396 XFS/XFG patients, as well as 10,179 individually matched 3:1 control patients, 64% were female and the average age of XFS onset was 74.3 yrs. In a univariate model, we observed a very modest increased risk of wet AMD in XFS/XFG patients (odds ratio, OR = 1.14, 95% confidence interval (CI) 0.99–1.32), which did not achieve statistical significance (p = 0.07). After adjusting for the main effects of potential confounders, there was no greater presentation of AMD in XFS/XFG patients when compared with controls (dry AMD: OR = 0.94, 95% CI 0.85–1.05, p = 031; wet AMD: OR = 0.98, 95% CI 0.83–1.14, p = 0.76). In XFS/XFG patients compared to controls, the risk of having cataract surgery was elevated (OR = 2.39, 95% CI 2.18–2.62). However, after accounting for an interaction with AMD, XFS/XFG patients who underwent cataract surgery did not exhibit an increased risk of either dry or wet AMD (dry AMD: OR = 0.91, 95% CI 0.80–1.03; wet AMD: OR = 0.89, 95% CI 0.75–1.07). The risk of AMD in XFS/XFG patients vs. controls showed no association with osteoporosis/vitamin D deficiency for dry (OR 0.78 95% CI 0.66–0.92 p = 0.004) or wet AMD (OR = 0.72 95% CI 0.56–0.92 p = 0.01), while we found a borderline positive association with both dry and wet AMD if they had osteoporosis/vitamin D deficiency. Conclusion: Using the Utah Population Database, we found that a cataract surgery history significantly impacts the association between AMD and XFS, and that vitamin D deficiency/osteoporosis is a significant confounder of the association. However, no direct association between XFS and AMD was found in this study.

Ambient air pollution exposure and incidence of cataract surgery: The prospective 3City‐Alienor study

AbstractPurposeCataract, the leading cause of blindness worldwide, is a multifactorial disease involving oxidative stress mechanisms. The aim of our study was to investigate the relationship between air pollution exposure and the incidence of cataract surgery.MethodsThe 3C‐Alienor study is a population‐based cohort of residents of Bordeaux, France, aged 65 years or more, recruited in 1999–2000 and followed every 2–3 years until 2017. Cataract surgery was self‐reported and checked at slit‐lamp by trained professionals. Average air pollution exposure (particulate matter ≤2.5 μm (PM2.5), black carbon (BC), nitrogen dioxide (NO2)) in the 10 years preceding baseline was estimated at the participants' geocoded residential address, using temporally adjusted land use regression. Associations of 10‐year average air pollution exposure with incidence of cataract were estimated using Cox proportional hazard models adjusted for confounders.ResultsThe study included 829 subjects without cataract surgery prior to inclusion; the mean age at inclusion was 72.6 years (standard deviation (SD): 4.2) and 61% were women. The median (Interquartile‐range (IQR)) follow‐up duration was 14.1 (6.4) years during which 507 participants underwent cataract surgery. Exposure to a concentration ≥40 μg/m3 of NO2 (the current regulatory limit value in Europe) was associated with incident cataract surgery (HR = 1.46, CI (1.16, 1.84), p = 0.001). No statistically significant association was found with PM2.5 and BC.ConclusionLong‐term exposure to a NO2 concentration ≥ 40 μg/m3 was associated with an increased incidence of cataract surgery. Complying with current European air pollution standards could reduce cataract surgery costs and improve population quality of life.

Comparison of two formulas for calculating intraocular lens in patients with angle-closure glaucoma

This study compares the accuracy of SRK/T and Barrett Universal II intraocular lens (IOL) measurement formulas for cataract phacoemulsification combined with intraocular lens implantation in angle-closure glaucoma (ACG) patients. Prospective serial case studies were conducted. A total of 146 patients (146 eyes) with ACG complicated with cataract who underwent cataract surgery with atrial angle closure ≤180° were observed. All the patients were divided into 2 groups according to different intraocular lens calculation formula, with 73 cases in each group (73 eyes). SRK/T intraocular lens calculation formula was used in group A, and Barrett intraocular lens calculation formula was used in group B. The visual acuity, the best corrected visual acuity, intraocular pressure and central anterior chamber depth were significantly improved in 146 eyes 3 months after operation, and the differences were statistically significant. There was statistically significant difference in postoperative spherical equivalent (SE) between the 2 groups (t = 2.147, P = .033), and there was statistically significant difference in preoperative expected refraction between group A and postoperative SE (t = 4.221, P < .001). There was no significant difference between preoperative expected diopter and postoperative SE in group B (t = 1.857, P = .065). The difference in absolute predicted error between the 2 groups was statistically significant (t = 4.929, P < .001). Axis length was negatively correlated with SRK/T formula and Barrett Universal II formula absolute refractive error value (ME) (group A: r = ‐0.740, P < .001; group B: r = ‐0.532, P < .001), there was A significant negative correlation between absolute refractive error value and anterior chamber depth in both groups (group A: r = ‐0.382, P = .001; group B: r = ‐0.358, P = .002). The cataract phacoemulsification combined with intraocular lens implantation is safe and effective for ACG patients with cataract. For such patients, the Barrett Universal II intraocular lens measurement formula may be more accurate after surgery.

Cataract surgery combined with glaucoma surgery.

This review evaluates the surgical management of glaucoma in patients undergoing cataract surgery. Combining both procedures present challenges in balancing intraocular pressure (IOP) control, minimizing postoperative complications, and achieving optimal refractive outcomes. Recent studies highlight the effectiveness of combined glaucoma and cataract surgeries, with traditional filtering surgeries and MIGS showing significant IOP reduction. The abundance of long-term studies shows that MIGS can offer an effective and safer alternative when carefully tailored to meet the specific needs of each patient. Combining glaucoma and cataract surgery is a promising approach for patients with coexisting conditions. While traditional surgeries offer robust IOP reduction, MIGS procedures offer better safety profiles with fewer complications and more predictable refractive results. Surgeons must carefully consider the timing and choice of procedures, with further research required to develop standardized treatment algorithms.

Diagnosis of cystoid macular edema by comparison of pre-operation and post-operation macular thickness calculated by optical coherence tomography (OCT) after cataract extraction surgery with and without pre-operative use of NSAIDS.

ABSTRACT… Objective: To compare mean macular thickness after cataract extraction surgery with and without pre-operative NSAIDs. Study Design: Randomized Controlled Trial. Setting: Department of Ophthalmology, Madinah Teaching Hospital, Faisalabad. Period: 21-10-2022 to 20-04-2023. Methods: Total 640 patients (320 in each group) were involved in the study. In group-A patients received one drop of NSAID three times a day for one day prior surgery. In group-B, patients not received NSAID. Results: Results showed that there was a total 395 males and 245 females. Mean age of the patients was 48.24±5.54 in group A and 47.05±5.20 in group B. Comparison of macular thickness showed that thickness was 215.69±14.20 in group A and 227.99±06.09 in group B. There was a significant difference in macular thickness of two groups (P <0.001). Conclusion: In conclusion, preoperative usage of NSAIDs revealed statistically significant (p0.001) and clinically relevant benefits in avoiding macular edoema and preserving visual acuity in patients undergoing cataract surgery as compared to the non-NSAIDs group.

Non-inferiority of Cataract Surgery in a Stand-Alone Unidirectional Airflow System Versus in a Conventional Operating Room: A Retrospective Study

Purpose To demonstrate the non-inferiority of a stand-alone unidirectional airflow system, the SurgiCube (Surgi-Cube International BV), for cataract surgery compared to a conventional operating theater (OT). Methods This was a retrospective and comparative cross-sectional study conducted at the Rothschild Foundation, Paris, France. All patients who underwent cataract surgery using the SurgiCube between February 2020 and February 2023 were included and compared to a separate group of patients with cataract surgery performed in a conventional OT and under topical anesthesia during the same period. Patients with less than 1 month of follow-up after surgery were excluded. We collected relevant information from the patient's medical records. Main outcome measures, incidence of endophthalmitis, intraoperative and postoperative complication incidence, 1-month logarithm of minimum angle of resolution (logMAR) visual acuity and intraocular pressure, and operating times were analyzed. Results A total of 1,901 eyes in the SurgiCube group were compared to 5,474 eyes in the OT group. The occurrence of endophthalmitis was 0.05% (n = 1) in the SurgiCube group versus 0.07% (n = 4) in the OT group ( P = 1.00; odds ratio = 0.72 [95% CI = 0.01 to 7.28]). The percentage of procedures with at least one perioperative complication was 2.6% in the SurgiCube group and 2.7% in the OT group ( P = .87; odds ratio = 0.96 [95% CI = 0.68 to 1.34]). The percentage of procedures with a postoperative complication was 6.31% in the SurgiCube group and 6.6% in the OT group ( P = .59; odds ratio = 0.94 [95% CI = 0.75 to 1.17]. Average visual acuity at 30 days was 0.04 logMAR in the SurgiCube group and 0.07 logMAR in the OT group ( P = .62). The average operating times were 16.8 and 19.7 minutes for the SurgiCube and OT groups, respectively ( P < .001). The average occupation room times were 26.2 and 32.3 minutes for the SurgiCube and OT groups, respectively ( P < .001). Conclusions Cataract surgery in the SurgiCube seems to be non-inferior to cataract surgery in a conventional OT. [ J Refract Surg . 2024;40(11):e884–e891.]

Is Floppy Eyelid Syndrome predictive of Intraoperative Floppy Iris Syndrome? A prospective and translational study

Intraoperative floppy iris syndrome (IFIS) is defined as an excessive billowing of the iris during cataract surgery. Floppy eyelid syndrome is defined as an excessive hyperlaxity of the eyelids. Based in our daily experience, we suspected FES to be associated with IFIS. This association has been investigated. The goal of the study was to explore whether FES was predictive of IFIS. We conducted a prospective observational single-center study at the University Hospital of Nice. IFIS and FES were investigated in patients undergoing cataract surgery from November 2019 to May 2021. In addition, tarsus and iris samples were harvested in 2 fresh cadavers, and Verhoeff staining was used to identify elastin fibers. We included 452 eyes (n=312 patients, 50.9% male) with a mean age of 71.7years (±11.4). IFIS was diagnosed in 88 (19.5%) patients, including 20 (4.4%) grade 1, 34 (7.5%) grade 2, and 33 (7.3%) grade 3. FES was diagnosed in 35 (7.7%) patients. PEX was found in 23 (5.1%) patients. On multivariate analysis, FES (P<0.001), pseudo exfoliation (P=0.017), intracameral dilatation (P<0.004), senior surgeons (P=0.009) and α1-ARA (P<0.001) were associated with IFIS. Elastin fibers were identified in small amounts in the tarsus samples but not in the iris samples. FES is predictive of IFIS. Surgeons should be aware of this association to prevent intraoperative complications.

Visual Outcomes After Cataract Surgery With the Light Adjustable Lens in Japanese Patients With and Without Prior Corneal Refractive Surgery

Purpose To describe Light Adjustable Lens (RxSight, Inc) (LAL) visual and refractive outcomes in a Japanese patient population with and without prior refractive surgery. Methods In this retrospective chart review of patients with cataract in a private eye clinic, 34 eyes from 21 patients underwent cataract surgery with LAL implantation. Eyes underwent light treatment to adjust the patients' refraction after implantation to meet individual visual goals. Standard visual and refractive outcomes were collected. Contrast sensitivity (to assess quality of vision), clinical defocus and vergence curves (to assess range of vision), and patient satisfaction were also collected. Results The mean prediction error of the light adjustment was −0.04 ± −0.48. Thirty-one eyes (91%) and 33 eyes (97%) were within ±0.25 and ±0.50 diopters (D) of manifest spherical equivalent target, respectively. Thirty-two eyes (94%) had residual refractive cylinder of 0.50 D or less. The full depth of focus was 3.68 D. Monocular contrast sensitivity shows frequencies equivalent to a normal population aged 50 to 60 years. The mean satisfaction score was 8.8 (scale: 1 to 10). There were no adverse events and no eyes lost corrected distance visual acuity from the light treatment. Conclusions LALs in cataract refractive surgery hold great promise, including for the Japanese population, which have unique ocular biometrics. By providing a safe procedure and the ability for postoperative adjustments, the LAL provided a tailored approach to vision correction, ultimately improving patient outcomes and satisfaction. [ J Refract Surg . 2024;40(11):e854–e862.]

Visual and Surgical Outcomes of Outreach Cataract Surgeries in Ilam District of Nepal: An Observational Study

Introduction: Cataracts are the leading cause of preventable blindness worldwide. Although cataract blindness is reversible, its service coverage remains poor, particularly in rural and hilly areas of Nepal. The study aimed to evaluate visual outcomes of outreach cataract surgeries and associated intraoperative and post-operative complications. Methods: This cross-sectional study was conducted at a district of Eastern Nepal after ethical clearance was taken from the Institutional Review Committee (Reference number: 88). Total 131 subjects had cataract surgeries at the surgical camp, and their pre-operative, one-day and one-month post-operative visual acuities were compared, and intraoperative and post-operative surgical complications were recorded. Visual acuity ≥ 6/12 was considered normal. Data was collected in excel and analyzed in SPSS. Results: The mean age of participants was 71.8±9.51 years, with 70 (53.43%) male. A total of 156 eyes from 131 subjects underwent cataract surgeries and among them 25 (19.08%) cases underwent bilateral cataract surgeries. At the day one of surgery, visual acuity improved to normal in 137 (87.82%) of cases, while after one-month, visual acuity improved to normal in 150 (96.15%) of cases with best-corrected glasses. There were 4 (2.56%) intraoperative complications, which included surgery-induced subluxated bag, premature entry, iris trauma, and posterior capsule rent. Conclusions: The visual and surgical outcomes of cataract surgeries performed at an outreach surgical camp were excellent with minimal surgical complications.

AVALIAÇÃO DA QUALIDADE VISUAL EM PACIENTES SUBMETIDOS A CIRURGIA DE CATARATA COM IMPLANTE DE LENTE INTRAOCULAR VIVITY

Cataract is an eye condition characterized by the clouding of the lens, the eye's natural lens, which results in a progressive loss of vision. This disorder affects millions of people worldwide, being defined as the leading cause of preventable blindness on the planet. The only treatment is the removal of the lens with the implantation of an intraocular lens (BMC Ophthalmology, 2016). This is a descriptive, observational, qualitative, and quantitative study based on the application of a questionnaire to patients undergoing phacoemulsification at a private ophthalmology center in Aracaju, the Instituto de Olhos Cristiano Mendonça, by ophthalmology specialist Dr. C.Q.M. This questionnaire was developed as an adaptation of the Visual Function Index (VF-14) by Pereira et al. (2017). It was initially designed to assess the visual impairment caused by cataracts. The objective of this study was to evaluate personal satisfaction and verify the effectiveness of the implantation of the AcrySof IQ Vivity intraocular lens in patients who previously underwent cataract surgery, associating it with postoperative refractive outcomes. Most participants who underwent this surgery achieved excellent refractive results and visual acuity, along with a positive association with the VF-14 questionnaire.

AVALIAÇÃO ULTRASSONOGRÁFICA DO CONTEÚDO GÁSTRICO EM PACIENTES SUBMETIDOS À CIRURGIA DE CATARATA

Introduction: Cataract surgery is the most commonly performed ophthalmologic procedure worldwide, and the disease is one of the main causes of reversible blindness worldwide. Objective: To analyze the ultrasound evaluation of gastric contents in patients undergoing cataract surgery. Methodology: Series report evaluating 24 patients in the perioperative period at the bedside using ultrasound to investigate the presence of gastric content that could indicate the risk of aspiration or other anesthetic complications. Results: Thus, 16 patients (66.6%) were female, and 8 (33.3%) were male. The mean age observed was 66.4 years (42-80). The average fasting time was 13 hours and 6 minutes, with the shortest fasting time at 7 hours and the longest at 24 hours. The mean residual gastric volume was 43.7 mL, with a minimum of 0 mL and a maximum of 138.9 mL. Conclusion: The substantial variance in gastric volumes assessed in the study underscores the need for further perioperative intervention studies focused on shortened fasting times and the use of fast-absorbing carbohydrates to confirm their added benefit to safety, documented as an empty stomach through bedside ultrasound.

Patients’ perceptions on reluctance to undergo cataract surgery in Sedibeng district hospital, Gauteng province

Background: Over 50 million people are blind, and 135 million people suffer from severe visual impairments, with cataracts contributing to 51% of global blindness cases. Despite efforts to promote cataract surgery (CS), many patients remain hesitant, underscoring the importance of understanding their perspectives.Aim: This study aimed to explore and describe patients’ perceptions regarding reluctance to undergo CS to improve awareness and increase surgery uptake.Setting: The research was conducted in the Sedibeng District, Gauteng province, South Africa.Methods: A qualitative descriptive phenomenological design was employed to capture the lived experiences of patients through face-to-face, individual semi-structured interviews with 15 patients aged 38 – 72 years prior to their CS. Purposive sampling was used to select participants, and Colaizzi’s seven-step analysis was used for data analysis.Results: The findings highlight several barriers perceived by participants, including long waiting times; fear; lack of knowledge; limited financial, material and human resources; power outages; uncontrolled blood sugar levels; and coronavirus disease 2019 (COVID-19) pandemic restrictions. Nevertheless, some view it positively as a means to avert blindness and enhance vision.Conclusion: To address the challenges, the study recommends boosting the number of eye health care professionals, prioritising budget allocation, addressing electricity interruptions and conducting community outreach educational programmes to improve access to CS in the district.Contribution: The insights gained from this study can help health care providers and policymakers optimise care and support for CS patients through policy formulation and education. Addressing these knowledge gaps will likely increase surgery uptake and improve patients’ quality of life.

Outcomes of Bent Ab Interno Needle Goniectomy Versus Incisional Goniotomy In Primary Open Angle Glaucoma Patients Undergoing Cataract Surgery

Outcomes of Bent Ab Interno Needle Goniectomy Versus Incisional Goniotomy In Primary Open Angle Glaucoma Patients Undergoing Cataract Surgery

Clinical Evaluation of Violet Light Filtration and High-Resolution Lathing on a Diffractive Extended Depth of Focus IOL.

This study is a prospective, randomized, subject/evaluator-masked clinical trial in a single-center clinical setting. The purpose of the study is to compare the clinical performance of Tecnis Symfony Optiblue IOL (models ZXR00V and ZXW150) with violet light filter (VLF) and manufacturing improvements versus Tecnis Symfony IOL (models ZXR00 and ZXT150) with ultraviolet light filter (UVF) in patients undergoing cataract surgery. Patients with cataracts aged ≥ 22years were randomly assigned 1:1 to bilateral implantation with ZXR00V/ZXW150 (VLF group) or ZXR00/ZXT150 (UVF group). Key endpoints at 6months postoperative included patient reported nighttime dysphotopsia symptoms, 25% low contrast visual acuity with glare, and patient satisfaction. Sixty patients were implanted with ZXR00V/ZXW150 (30) or ZXR00/ZXT150 (30). At 6months, the VLF group did not show a statistically significant differences in mean monocular photopic uncorrected distance visual acuity (UCDVA), best-corrected distance visual acuity (BCDVA), uncorrected near visual acuity (UCNVA) (40cm), or distance-corrected near visual acuity (DCNVA) (40cm) compared to the UVF group. At 1month, patients in the VLF group reported significantly less difficulty due to halo (p = 0.016) and starburst (p = 0.028) symptoms. By the 6months, dysphotopsia complaints were no longer significantly different between the groups. Although the VLF group trended toward better low contrast visual acuity and patient satisfaction, statistical significance was not reached. Managing the patients' expectations is key to achieving success. At the 1-month visit the patients who reported dysphotopsia complaints in the VLF group had significantly less difficulty with starbursts and halos as compared to the UVF group. By the 6-month visit, there was no significant difference between the two groups in the difficulty with starbursts and halos. ClinicalTrials.gov identifier, NCT06567834.

Evaluation of postoperative outcomes after cataract surgery in patients with Juvenile Idiopathic Arthritis-Associated Uveitis.

To evaluate the postoperative outcomes of cataract surgery and intraocular lens (IOL) implantation on visual outcomes and complications in pediatric patients with Juvenile Idiopathic Arthritis-Associated Uveitis. This study included 25 patients (30 eyes) with uveitis and cataracts who underwent cataract surgery. The study was conducted as a retrospective study. Patients were divided into two groups based on their preoperative treatment: those who received immunomodulatory therapy (IMT) along with systemic corticosteroids and those who received IMT in combination with a biologic therapy. Best corrected visual acuity (BCVA), intraocular pressure (IOP), central macular thickness (CMT), macular volume (MV), and postoperative complications were assessed at various time points up to 12 months. All surgeries were performed by a single surgeon. Significant improvement in BCVA were observed postoperatively in both study groups, with approximately 80% of eyes showing improvement. Mean BCVA improved from 0.89 ± 0.63 to 0.37 ± 0.33 in group 1and from 0.82 ± 0.68 to 0.35 ± 0.31 in group 2 after 12 months. Postoperatively, there was a decrease in mean IOP, with no significant variance observed between the two groups. Complications were observed in 73% of cases, including posterior capsular opacification (PCO), secondary glaucoma, and macular edema (ME), but did not significantly differ between groups. Cataract surgery in children with uveitis associated with JIA presents significant challenges due to the risk of postoperative complications, even with adequate preoperative and postoperative care. The similar improvement in BCVA observed in both groups suggests that different systemic therapies were sufficient for satisfactory control of inflammation before and after surgery.

Alterations in optical coherence tomography angiography parameters after cataract surgery in patients with diabetes

This prospective study aimed to investigate microvascular changes in diabetic patients undergoing cataract surgery. Foveal avascular zone (FAZ) area, as well as vessel density (VD) in the macula and radial peripapillary capillary plexus (RPC), were compared before and after surgery. Sixty eyes (72.3%) had no diabetic retinopathy (no DR group) and 23 eyes (27.7%) had non-proliferative diabetic retinopathy (DR group). In the no DR group, the FAZ area in the superficial capillary plexus (SCP) decreased from 0.41 ± 0.13 to 0.38 ± 0.11 mm2 (P = 0.036), while no significant change was observed in the DR group (0.33 ± 0.12 to 0.30 ± 0.12 mm2, P = 0.091) at 6 months postoperatively. VD in the RPC increased from 34.4 ± 2.3% to 35.6 ± 2.3% in the no DR group (P = 0.009), but there was no significant change in the DR group (33.0 ± 3.5% vs. 34.0 ± 2.3%, P = 0.051) after 6 months. VD in the macula did not change in either group. Phacoemulsification reduced the FAZ area in the SCP and increased the VD in the RPC in diabetic patients without diabetic retinopathy at six months postoperatively.

Importance of different topographic, biometric, and retinal parameters for calculating IOL power

The objective is to evaluate the parameters significantly related to calculating the power of the implanted lens and to determine the importance of different biometric, retina, and corneal aberrations variables. A retrospective cross-sectional observational study used a database of 422 patients who underwent cataract surgery at the Oftalvist Center in Almeria between January 2021 and December 2022. A random forest based on machine learning techniques was proposed to classify the importance of preoperative variables for calculating IOL power. Correlations were explored between implanted IOL power and the most important variables in random forests. The importance of each variable was analyzed using the random forest technique, which established a ranking of feature selections based on different criteria. A positive correlation was found with the random forest variables. Selection: axial length (AL), keratometry preoperative, anterior chamber depth (ACD), measured from corneal epithelium to lens, corneal diameter, lens constant, and astigmatism aberration. The variables coma aberration (p-value = 0,12) and macular thickness (p-value = 0,10) were almost slightly significant. In cataract surgery, the implanted IOL power is mainly correlated with axial length, anterior chamber depth, corneal diameter, lens constant, and preoperative keratometry. New variables such as astigmatism and anterior coma aberration and retina variables such as the preoperative central macular thickness could be included in the new generation of biometric formulas based on artificial intelligence techniques.

Pseudo-plateau iris secondary to multiple peripheral pigment epithelial cysts: A case report

Iris epithelial cysts are rare, spontaneous, epithelium-lined spaces that arise from the iris-pigmented epithelial layer and ciliary body and can cause a narrowing of the anterior chamber angle leading to a pseudo-plateau iris configuration (PPI). We present the case of an 80-year-old female patient with a history of decreased visual acuity, diagnosed with bilateral cataracts and pseudo-plateau iris secondary to multiple peripheral pigment cysts. This report describes the detection process, management strategy and course of treatment of a patient with bilateral cataracts who underwent cataract surgery by manual incision, and clinically presented with Pseudo-plateau iris secondary to Iris epithelial cyst. It highlights the importance of early detection and correct differentiation from malignant conditions, and anterior segment pathologies to prevent associated permanent complications.

Macular changes after cataract surgery.

This article aims to highlight if the central macular retina suffers changes after cataract surgery, and to evaluate the eventually discovered changes regarding persistence. This retrospective study, which lasted over three years (2021-2023), included patients who underwent cataract surgery performed by one surgeon. Spectral-domain optical coherence tomography (SD-OCT) imaging assessed macular changes and measured the central macular thickness. A total of 240 eyes with diagnosed senile cataract were included in this study. The mean age was 66 years ± 4 years. Preoperative central foveal thickness was 210 ± 27.3 µm, the postoperative thickness on day 1 was 234.3 ± 40.2 µm, at 6 months 230.5 ± 35.2 µm, and the 1-year follow-up 229.2 ± 30.3 µm. Macular changes after cataract surgery are easily confirmed by SD-OCT. The evaluation and monitoring of macular changes can be done by using central macular thickness assessment. The study provides data from a Romanian pool of patients. The values correlated well with those from similar studies of SD-OCT examinations, but differences were still observed, as there were different devices for performing SD-OCTs.