View clinical trials related to Refractive Errors.
Filter by:Experienced soft contact lens wearing subjects will be enrolled in this 1-week, post-market, bilateral, repeated measures, dispensing study. All subjects will be seen for a Screening/Dispensing Visit at which informed consent will be obtained and eligibility will be assessed. If subjects satisfy all eligibility criteria and none of the exclusion criteria, subjects will be fit and dispensed study lenses. If unsuccessful in the dispensed lenses, additional lenses may be trialed. Once vision and lens fit are determined to be acceptable, eligible subjects will wear study lenses in both eyes for at least 8 hours per day (with the exception of the follow-up visits where the lenses should be worn for a minimum of 2 hours), for approximately 1 week (7 days +/-3 days). Measurements will be taken at the insertion visit and at the 7-day follow-up visit.
Determine if Total30 for Astigmatism contact lenses (CLs) provide a comfortable wearing experience all day. CL discomfort affects most CL wearers with discomfort consistently topping the reasons why established CL wearers drop out of CLs. In fact, studies have consistently found that the frequency of CL dropout is around 20% with this dropout frequency staying relatively stable over the past 20 plus years. This static frequency of CL dropout is surprising since there have been a number of dramatic soft CL innovations during this time frame (e.g., widely available daily disposable CLs, silicone hydrogel CL materials with high oxygen transmissibility, new CL surface coatings).
The purpose of this study is to assess the clinical performance of DAILIES TOTAL1® spherical soft contact lenses over approximately 1 week of daily wear.
Demonstrate that refraction measurements from the device agree with refraction measurements from a phoropter within clinically meaningful limits.
The purpose of this study is to assess the WaveLight Ultraviolet Femtosecond Laser System, Model 1026 (UV fs-Laser) corneal flap creation accuracy as compared to the already marketed WaveLight FS200 Infrared Femtosecond Laser, Model 1025 (IR fs-Laser).
The purpose of this retrospective, Post-Market Clinical Follow-Up (PMCF) study is to assess the long term performance and safety of Air Optix® Night and Day® Aqua (AONDA) contact lenses in a real-world setting when worn as 30 days of continuous wear for vision correction.
The purpose of this Post-Market Clinical Follow-Up (PMCF) study is to assess long term performance and safety of Air Optix® Night and Day® Aqua (AONDA) contact lenses in a real-world setting when worn as daily wear for vision correction.
This study intends to analyze the characteristics between peripapillary retinal nerve fiber layer thickness and peripapillary area in high myopia with or without glaucoma
The primary objective of this study is to evaluate the axis orientation of LID226397 toric contact lenses.
Photobiomodulation therapy, that is, Low-level red-light technology provides a new and innovative myopia control approach. This strategy enables relatively high energies of light to be delivered at much shorter durations of exposure to induce the myopia control effect. The efficacy of the low-level red-light technology has been proven in a Chinese populationb for the recent 3 years with evidence based papers and amazing results. However, there's not yet evidence to demonstrate the relationship between the dose response effect of photobiomodulation therapy on myopia control at the different age lever.