Toric Soft Contact Research Articles

Clinical performance evaluation of two daily disposable toric soft contact lenses – Verofilcon A versus etafilcon A

Clinical performance evaluation of two daily disposable toric soft contact lenses – Verofilcon A versus etafilcon A

Initial market experienceś analysis of a novel myopia management toric soft contact lens

Initial market experienceś analysis of a novel myopia management toric soft contact lens

Clinical performance of verofilcon A and stenfilcon A daily disposable toric soft contact lenses

Clinical performance of verofilcon A and stenfilcon A daily disposable toric soft contact lenses

International trends in prescribing toric soft contact lenses to correct astigmatism (2000–2023): An update

PurposeThere have been significant advancements in toric soft contact lens design and manufacturing technology, and increased product availability, over the past half a century. The purpose of this work is to update earlier surveys by describing international trends in toric soft lens fitting between 2000 and 2023, inclusive. MethodAn annual contact lens prescribing survey was sent to eye care practitioners in up to 71 countries between 2000 and 2023, inclusive. Data relating to 220,934 standard soft daily wear single vision lens fits undertaken in 20 countries returning reliable longitudinal data were analysed in respect of toric soft lens fitting. ResultsOverall, toric soft lens prescribing almost doubled over the time-course of this survey, from 24.4 % of standard soft daily wear single vision lens fits in 2000 to 46.2 % in 2023 (p < 0.0001). There were significant differences between countries in toric soft lens prescribing (p < 0.0001). Of all standard soft daily wear single vision contact lenses prescribed to males, 32.0 % were toric soft lenses, compared with 28.7 % for females (p < 0.0001). The mean age of toric soft lens wearers was 30.5 ± 12.5 years, compared to 27.9. ± 12.1 years for spherical soft lens wearers (p < 0.0001). Analysis of 13,582 recent toric soft lens fits (2019–2023, inclusive), in terms of material type and replacement frequency, revealed the following proportions: reusable silicone hydrogel – 51 %; daily disposable silicone hydrogel – 27 %; daily disposable hydrogel – 12 %; and reusable hydrogel – 10 %. ConclusionThere has been a substantial increase in toric soft lens fitting throughout the 24 years of this survey, to a point whereby almost all clinically significant astigmatism is being corrected among those wearing standard soft daily wear single vision lenses.

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.

Effectiveness of toric soft contact lenses for vision correction in patients with different degrees of astigmatism: a real-world study.

To assess the visual correction of patients with different degrees of astigmatism with toric soft contact lenses (TSC). It was a real-world study with prospective and single-arm design. A total of 384 patients with astigmatism who came for TSC fitting and alignment from November 2022 to January 2023 were included. According to the difference in astigmatism, patients were divided into groups A (cylinder degree: -0.75 to -0.50 D), B (cylinder degree: -1.75 to -1.00 D) and C (cylinder degree ≤ -2.00 D), and followed up on the day of wear, 1wk, 1 and 3mo, mainly to observe visual acuity, refraction, lens fit, visual quality and comfort at 1wk after wear. The visual acuity success rate and the overall success rate of the fitting were evaluation indicators (taking into account the four dimensions of visual acuity, fitting, quality of vision and comfort). The visual acuity success rate was calculated by taking "corrected visual acuity with contact lenses is no less than 1 line or better than best spectacle-corrected visual acuity" (i.e. corrected visual acuity with contact lenses is 1 line below, equal to, one line above or more than best spectacle-corrected visual acuity) as the criterion for visual success, and the the overall success rate of the fitting was calculated by using the comprehensive indicators (visual acuity, fit, visual quality, comfort) to meet certain conditions as the judgment criteria for successful fitting. After 1wk of wearing TSC, the visual acuity success rates of patients were 100% (207/207), 98.58% (139/141) and 97.22% (35/36) in the three groups, respectively, with residual cylinder closed to 0. The acceptability of the lens fitting was over 95%; the incidence of adverse visual symptoms was within 10% and the comfort acceptability was over 97%. The overall success rate of fitting for patients with high, medium and low astigmatism was 93.72% (194/207), 90.78% (128/141) and 88.89% (32/36), respectively. TSC (model: G&G POP·CT) are effective in correcting astigmatism in patients with different degrees of astigmatism.

What is the willingness to pay for soft toric contact lenses?

Ashton Morgan, John Whitehead and Philip Morgan report on a recently published peer review paper in Contact Lens and Anterior Eye by the same authors that presents an economic analysis of the benefits of soft toric contact lenses 1

How to Fit Toric Soft Contact Lenses?

Background: Refractive error is the first cause of visual impairment and the second cause of vision loss worldwide. Astigmatism is an eye refraction disorder that is characterized by various degrees of refraction in various meridians. Thus, the parallel rays coming into the eye are not focused on one point. One of the treatments is toric soft contact lenses, which is used in astigmatism patients by 47% with astigmatism above 0.75 D. This case report describes the use of toric soft contact lenses using a trial with markers at 6 o'clock, 3 o'clock, and 9 o'clock for the management of regular astigmatism.&#x0D; Case presentation: In this paper, we report 3 cases of patients using toric soft contact lenses. The first patient was a 29-year-old male, the second patient was a 24-year-old female, and the third patient was a 25-year-old male with slowly blurred vision in both eyes and had been wearing glasses. The three cases were classified as moderate astigmatism with a power of 1.25 D and 1.50 D. The patients were given toric soft contact lenses for correction. Contact lens fitting was performed on the patient. &#x0D; Conclusion: Correction of astigmatism can be done by giving glasses, contact lenses, or refractive surgery. If the contact lens axis is suitable, a prescription can be given immediately. If the axis of the toric soft contact lens does not match the available trials, it is necessary to order the size of the toric contact lens according to the astigmatism disorder in the patient's eye.

PREVALENSI PENDERITA MYOPIA YANG DIREHABILITASI DENGAN LENSA KONTAK LUNAK DI OPTIK KARTIKA JAYA

This study aims to determine the description of the wearer of spherical soft contact lenses as a tool to rehabilitate the visual acuity of patients with myopia refractive error at Kartika Jaya optics Bekasi. The population in this study were all patients with refractive errors who used a soft contact lens vision rehabilitation tool. This type of research is descriptive analytic with a design description of the use of spherical soft contact lenses. The sampling system used in this study is a document research method from the same source, namely all customers who were examined at Kartika Jaya optics. Analysis of hypothesis testing using SPSS version 24, which resulted in: the rehabilitation of visual acuity of patients with refractive errors of myopia using colorless spherical soft contact lenses was quite significant and the use of colored soft toric contact lenses was not significant.

Clinical performance and Willingness To Pay for soft toric contact lenses in low and moderate astigmats

PurposeTo determine clinical performance and the ‘Willingness To Pay’ for toric vs. spherical soft contact lenses in an astigmatic population. MethodsIn the clinical study, subjects with binocular low to moderate astigmatism (-0.75DC to −1.50DC) wore pairs of soft toric (Biofinity toric) and spherical (Biofinity) contact lenses in random sequence. Visual acuity (high and low contrast, monocular and binocular), subjective comfort and subjective vision were recorded. In the economics study, first subjects who had participated in the clinical study were presented with a series of randomised economic scenarios in order to determine their Willingness To Pay a premium (i.e. an increase) for toric lenses. Then, a similar set of scenarios were presented to a much larger group of online respondents and again, Willingness To Pay was established. ResultsFor the four measures of visual acuity, the Biofinity toric lens out-performed the Biofinity spherical lens by 0.6 to 1.1 lines.. Subjective vision performance was statistically significantly better with the toric lens for the distance task only. Comfort scores were not significantly different. Similar findings for Willingness To Pay were established for the clinical subjects and for the online respondents. The Willingness To Pay premium (additional fee) for a monthly supply of toric lenses (over spherical lenses) was between £13 and £16, if a toric lens provides better vision and similar comfort, as shown in the clinical study. ConclusionConsumers are willing to pay a monthly premium of around 50% to benefit from the typical experience of better vision and similar comfort for toric vs. spherical lenses. The level of additional cost for toric lenses compared to their spherical equivalents is less than this in the market, so eye care professionals should consider that toric lenses are delivering a greater clinical return than anticipated by wearers for the relatively small increase in price.

Toric versus spherical soft contact lenses in the correction of low to moderate astigmatism

Danya Lahmami reviews the published evidence comparing the correction of astigmatism with either spherical or toric soft contact lenses. This is an edited version of the 2020 City University/Optician Best Dissertation prize-winner (C105880, suitable for logging as one distance learning CPD point for optometrists, contact lens opticians and dispensing opticians)

Guide and tools for comprehensive toric soft contact lens fitting

Contact lens options for astigmatic patients include commercially available toric soft contact lenses, custom soft contact lenses, rigid corneal and scleral contact lenses. Wide range of parameters and modalities of modern soft toric lenses covers more than 90 % of patients with astigmatism. It makes toric soft contact lenses most available and convenient option for eyecare specialists.Purpose of this publication is to review main steps of toric lens fitting and remind ECP about useful tools and services designed to reduce chair time.

Current approaches in the management of patients with keratoconus.

Keratoconus is a relatively frequent eye disease, especially in young patients, in which the cornea gradually thins and deforms in a cone shape. In the past, it could be treated only with glasses, rigid contact lenses or, for advanced cases, penetrating corneal transplant. Nowadays, corneal cross-linking, intracorneal ring segments implantation or deep anterior lamellar keratoplasty are available options of treatment, along with the above mentioned ones. Several studies focused on this disease and its management attempted to establish the applicability of these treatment methods in current practice. In the early stages, glasses or soft toric contact lenses are able to correct the astigmatism, but, as the disease progresses, rigid contact lenses are indicated. Corneal cross-linking is done in order to slow down or even stop the progression of the disease. Implanting intracorneal ring segments helps improve visual acuity in patients with low vision that cannot be corrected otherwise. Advanced stages need corneal transplant, either penetrating or anterior lamellar, depending on each patient's ocular characteristics. Thus, keratoconus treatment is individualized for every patient, according to the stage of the disease. Moreover, because of the new developed technology, keratoconus patients can benefit from efficient treatment, in much safer conditions.

Correction of moderate to high refractive astigmatism with extended range toric soft contact lenses in patients with different patterns of astigmatism.

This study aimed to evaluate the visual performance of extended range, toric soft contact lenses (TSCLs) in patients with keratoconus and moderate to high astigmatism with different astigmatic patterns. This was a retrospective, cross-sectional clinical study. Extended range TSCL users with astigmatism ≥3.0 D were included. Cases were categorised into three subgroups, namely regular, irregular (non-keratoconus) and keratoconic based on the topographic pattern of astigmatism. In addition, subjects were subdivided based on the degree of astigmatism. Fifty five patients (82 eyes) were enrolled, of whom 28 (51%) were female. The mean age was 24.2±7.5 (range: 8-41years) years. Thirty-six eyes with regular astigmatism (43.9%), 34 eyes with irregular astigmatism (41.5%) and 12 eyes with keratoconus (14.6%) were included. The percentage improvement in visual acuity (VA) was significantly higher with contact lenses compared with spectacles in all groups (p<0.001), with the highest improvement in subjects with keratoconus (p=0.03). Twenty six (31.7%), 30 (36.6%) and 26 eyes (31.7%) had moderate (-3.0 to -4.24 D), moderate/high (-4.25 to -5.99 D) and high (≤-6.0 D) astigmatism, respectively. The percentage improvement in VA with contact lenses was statistically significantly higher than for spectacle wear in all groups (p<0.001). This study demonstrated that satisfactory visual outcomes can be obtained with extended range TSCLs in patients having moderate to high astigmatism with different astigmatic patterns.

Closing the toric gap: Eye care professional attitudes towards soft toric contact lens attributes

Purpose: Contemporary soft toric contact lenses (TCLs) demonstrate good clinical performance to help eye care professionals (ECPs) meet astigmatic wearer needs, especially for vision. While TCL prescribing increases, global variation in fitting (e.g. Japan 17%, Spain 25% vs. global avg. 27%, Morgan 2021) compared to astigmatism prevalence (40%, Hashemi 2018) highlights a gap, suggesting an unresolved need in what ECPs believe about TCL performance. Global ECP research was conducted to understand these differences.

Evaluation of corneal biomechanical properties in spherical and toric soft contact lens wear

Purpose: Corneal hysteresis (CH) and corneal resistance factor was found to be less for patient wearing toric contact lens as compared to soft spherical CH was calculated as the difference in air pressures between force-in applanation (P1) and force-out applanation (P2), or (P1–P2). Materials and Methods: This was the prospective study, 40 eyes of 22 patients with mean age of 22.09 ± 4.05 years. Eleven eyes were fitted with soft toric contact lens and 29 eyes were fitted with soft spherical contact lens. Dry eye, keratoconic or any systemic pathology were excluded. Soft toric and soft spherical contact lenses (Comfilcon A, Coopervision, and Southampton, UK) were fitted. The Ocular response Analyzer (Reichert Ophthalmic Instruments, Depew, New York, USA) was used to measure CH before and after 3 months using soft toric and soft spherical contact lenses. Descriptive statistics were used to analyze the demographic data. Paired t-test was employed for analyzing the difference between the base line value of CH with soft toric and soft spherical contact lens wearers after 3 months. Independent t-test was used to find the association between CH and gender. Results: CH was found to be lesser after 3 months of soft toric contact lens wear, as compared with soft spherical contact lenses. Mean increase of CH was found to range from 10.44 ± 0.96to 10.80 ± 0.96 mmHg (P = 0.000). Conclusion: In this study, there was a decrease in CH after using soft toric contact lenses and increase after using soft spherical contact lenses for 3 months. The increased CH with soft spherical contact lens was reversible in nature. However, CH may differ between lens type and modality of wear which can lead to long-term changes in the corneal biomechanical properties.

Long Term Management of Gelatinous Droplet Dystrophy with Phototherapeutic Keratectomy and Toric Soft Contact Lenses

Long Term Management of Gelatinous Droplet Dystrophy with Phototherapeutic Keratectomy and Toric Soft Contact Lenses

YouTube as a source of information on keratoconus: a social media analysis

ABSTRACT Clinical relevance Keratoconus (KC) treatment in the early stage is usually with glasses or soft toric contact lenses, in advanced stages rigid gas-permeable corneal or scleral contact lenses are used. Optometrists should be aware of misleading information from online platforms when providing information to keratoconus patients. Background Keratoconus is a progressive corneal disease characterised by stromal thinning and corneal ectasia. To the best of our knowledge, there is no study evaluating the popularity, quality, and reliability of videos about keratoconus disease and its treatment published on YouTube. In our study, we aimed to evaluate the credibility, quality, and popularity of YouTube videos about keratoconus. Methods This is a retrospective, cross-sectional, register-based study. A YouTube search was performed using the keywords ‘keratoconus’, ‘keratoconus disease’, ‘keratoconus treatment’, ‘keratoconus cross linking’. The quality and reliability of video content were measured using the DISCERN questionnaire, the Journal of the American Medical Association (JAMA) score, and the Global Quality Score (GQS). The video power index was used to evaluate the popularity of the videos. Results One hundred videos were included in the study. The average duration was 6.33 min and average total number of views was 14,940. The mean DISCERN, JAMA, and GQS scores were 42.57 ± 12.04 (intermediate quality), 1.77 ± 0.51 (poor quality), and 3.63 ± 1.03 (intermediate quality), respectively. The mean video power index was 11.02 ± 24.55 (range, 0–193). The DISCERN score was significantly positively correlated with GQS and JAMA scores (p ≤ 0.001). Conclusions This study showed that YouTube videos about keratoconus contain moderately useful information for patients. So, physicians, being aware of the quality and diversity of online information, should correct any misinformation they encounter while face-to-face with patients.

Does offering only the spherical contact lens trial to the low astigmats mislead the practitioners?

To compare the visual acuity (VA), comfort, and patient preference in a soft toric contact lens (TCL) versus soft spherical contact lens (SCL) in low astigmatic subjects during the contact lens (CL) trial. This subject-masked, block randomized, 2×2 crossover study recruited 40 neophyte subjects (80 eyes) aged 18 to 33y with astigmatism in the range of 0.75-1.25 D with or without spherical power from -6.00 D to +6.00 D. The participants were scheduled for two days CL trial and were fitted with the best-fit SCL and TCL. After 4h of wear, they were assessed objectively for high contrast VA and subjective vision, comfort, and preference. The responses of 36 subjects (response rate 90%) with a mean age of 23.02±2.97y (range 18 to 33y) were analyzed. One-line improvement of monocular VA in the logMAR chart was reported to TCL as compared to SCL (-0.044±0.06 vs 0.04±0.03 logMAR, P=0.01) but the binocular vision remained similar (-0.12±0.07 vs -0.14±0.04 logMAR, P=0.38). Subjects felt a noticeable difference in clarity when shifted to TCL as compared to the SCL. The satisfaction with vision (vision quality) was significantly better with TCL (P=0.03). The fatigue with TCL was graded less at 2.5±0.6, compared to SCL at 4.6±1.3 (P=0.04). Thirty-three participants (91.6%) preferred to use contact lens of which 26 participants (79%) preferred TCL. The findings suggest that VA and comfort are better with TCL as compared to SCL which is only observed if the patient was offered both offering SCL with spherical equivalent power alone as the first option can mislead the practitioner; TCL trial should be the first choice of the lens in low-to-moderate astigmatism.

The Relationship of Knowledge Level of Installation and Maintenance with the Successful Use of Soft Contact Lens in Myopia patients

Background: Refractive errors have occurred in many parts of the world, including in Indonesia, with different types of abnormalities, one of which is myopia which can be corrected with glasses and spherical contact lenses. Aim: To determine the relationship between the level of knowledge of the installation and care of soft contact lenses in myopic patients. Methods: This research method is Cross Sectional at Optik Metro, the number of samples is the total population, the research instrument is a questionnaire, the independent variable of this research is the level of knowledge while the dependent variable is the attitude and behavior of Care and Installation with Successful Use of Contact Lenses. This research has been approved by the Widya Husada STIKES Ethics Commission. Results: The results of the study based on the number of sufferers and the distribution of refractive errors at Optik Metro from March 15-20, 2021, showed that the number of myopia patients who came was 13.0% with the type of treatment using soft contact lenses as much as 2.2%. There is a relationship between knowledge and attitudes of respondents with maintenance and installation behavior with successful use of LK with a significance value of 0.000 (p &lt; 0.05). Conclusion: It was concluded that the toric soft contact lens installation procedure was carried out in the right way by taking into account a good fitting assessment. It is necessary to provide education to increase knowledge and education on Care and Installation of Contact Lenses for all customers. Keywords: Knowledge, Attitude, Soft LK, Myopia