View clinical trials related to Refractive Errors.
Filter by:There are indications in the literature that binocular vision disorders may occur after cataract and corneal refractive surgery. It is not clear whether these problems are new or represent decompensation of previously existing conditions. However, the following significant study limitations exist in the current literature: 1) lack of attention to non-strabismic binocular vision disorders, 2) incomplete binocular vision assessment, 3) a validated symptom survey was not used, 4) diplopia was typically the only symptom studied, 5) retrospective study design, and 6) in the few prospective studies the sample sizes were small. Given the limitations in the current literature there is a need for further study of the prevalence and significance of binocular vision problems after cataract surgery and binocular vision and accommodative problems after corneal refractive surgery. This study aims to determine whether there is an increase in the prevalence of binocular vision problems after cataract surgery and accommodative and binocular vision disorders after refractive surgery.
The purpose of this study is to assess the clinical performance of an investigational, coated silicone hydrogel contact lens over approximately 30 days of daily wear.
The purpose of this study is to evaluate the visual performance of DAILIES® AquaComfort Plus® (DACP) Digital lenses by assessing distance visual acuity (VA) as compared to DACP sphere contact lenses after one week of wear.
The purpose of this clinical study is to evaluate the on-eye performance of an investigational soft contact lens compared to a commercially available soft contact lens following 1 night of extended wear.
This is a single-site, two-visit, contralateral, non-dispensing, randomized, controlled and subject-masked study to measure potential benefits of the new UV blocker.
The purpose of this study is to evaluate the overall performance of investigational contact lenses (DD T2) when compared to clariti® 1 day contact lenses.
This study is a randomized, 4-visit, double-masked, 2x3 bilateral crossover, dispensing trial. The study lenses will be worn as daily wear (DW) for a period of two weeks each with one of the study lenses being worn twice. Each study lens is expected to be worn at least five (5) days per week for at least six (6) hours per day worn. There will be no washout period between study lenses.
The purpose of this study is to explore overall vision with BIOFINITY® ENERGYS™ contact lenses as compared to BIOFINITY® contact lenses after one week of wear.
The purpose of this study is to obtain on-eye performance data to inform contact lens product development and to further evaluate product performance in the intended population.
The purpose of this clinical study is to evaluate DAILIES TOTAL1® Multifocal (DT1MF) contact lenses compared to 1-DAY ACUVUE® Moist® Multifocal (AMMF) contact lenses for investigator-graded lens centration in a Japanese population.