View clinical trials related to Refractive Errors.
Filter by:The purpose of this study is to compare DAILIES TOTAL1® (DT1) to 1-DAY ACUVUE® TruEye® (TE) for Investigator-rated successful lens centration in Japanese population.
The purpose of this study is to evaluate AIR OPTIX® plus HYDRAGLYDE® (AOHG) contact lenses compared to AIR OPTIX® AQUA (AOA) contact lenses in overall lens fit.
The purpose of this study is to evaluate the performance of two commercially-available silicone hydrogel contact lenses in normal and low humidity environments after at least 7 days of wear.
The purpose of this study is to evaluate the incidence of ocular discomfort device-related adverse events with DAILIES TOTAL1® with UV Absorber (DT1 UV) contact lenses compared with current DAILIES TOTAL1® (DT1) contact lenses.
Wavefront scans are a common form of diagnostic test applied in preparing patients for laser eye surgery. An optical map of the eye is created by wavefront scanning, and information from these maps is used to program lasers used to correct focusing errors in the eye. Here the investigators are comparing how repeatable measurements are with a new wavefront scanner and one that is already in widespread use.
Prospective, multicenter, bilaterally-treated, open-label, non-randomized clinical trial.
Myopia has emerged as a major health issue in east Asia, because of its increasingly high prevalence in the past few decades (now 80-90% in school-leavers), and because of the sight-threatening pathologies associated with high myopia, which now aff ects 10-20% of those completing secondary schooling in this part of the world. Similar, but less marked, changes are occurring in other parts of the world. The higher prevalence of myopia in east Asian cities seems to be associated with increasing educational pressures, combined with life-style changes, which have reduced the time children spend outside.
The Baltimore Reading and Eye Disease Study (BREDS) is a two year study to determine the prevalence of vision problems in an early school age population with reading difficulty. Comprehensive vision and reading tests will be administered to 400 students at participating schools in the Baltimore City Public School system. A secondary goal is to examine the impact of vision treatment on reading performance. Children with refractive error or convergence insufficiency will be provided treatment free of charge. The investigators will evaluate the impact that the treatment has on vision function and reading performance.
This will be an up to six months, subject-masked, contralateral, parallel-group, randomised, daily wear study. All subjects will wear the Test lens in one eye and the Control lens in the other eye. Data from the first four weeks of Test and Control lens exposure will be used for the FDA 510 (k) submission.
The purpose of this study is to validate the safety and effectiveness of treating myopia (short-sightedness) higher than -10D using small incision lenticule extraction (SMILE) with the VisuMax femtosecond laser.