Active clinical trials for "Refractive Errors"

The purpose of this study is to compare the lens fit characteristics, specifically lens centration, of ACUVUE® OASYS® 1-DAY (AO1D) contact lenses and DAILIES TOTAL1® (DT1) contact lenses.

This is a prospective, comparative, randomized, controlled, single-blind, single-surgeon, single-center PMCF clinical study whereby participants undergoing refractive surgery for correction of ametropia will receive a transepithelial PRK (tPRK) and conventional PRK treatment in the contralateral eye. To avoid bias in the clinical outcomes, the two PRK treatment options are randomized to the eyes of the patients based on ocular dominance. In addition, a 1:1 randomization is applied within the tPRK group to eyes with and without end-treatment laser polishing. Both procedures, standard PRK and tPRK, are performed in a one-step procedure. The main difference between the procedures is, that in conventional PRK, the epithelium will be removed using alcohol, whereas in tPRK procedures, the epithelium will be removed by laser ablation.

The purpose of this study is to compare the clinical performance of PRECISION1 contact lenses with Biotrue contact lenses.

The purpose of this study is to compare the clinical performance of PRECISION1™ for Astigmatism (P1fA) contact lenses with 1-DAY ACUVUE MOIST® for ASTIGMATISM (AMfA) contact lenses.

The purpose of this study is to evaluate the overall performance of PRECISION1™ contact lenses when compared to INFUSE™ contact lenses.

This is a multicenter, prospective, randomized, subject- and evaluator-masked, bilateral-implant study conducted at up to 15 sites worldwide. A total of up to 280 subjects will be randomized in a 1:1 ratio for implantation with either the TECNIS Symfony plus IOL Model ZHR00V or the Trifocal IOL. This will ensure that data from at least 100 subjects in the TECNIS Symfony plus lens group and at least 100 subjects in the Trifocal lens group will be available for analysis at the 6-month follow-up timepoint. All subjects will be followed for up to 6 months postoperative.

The results of this trial will demonstrate that the iDesign System performs as intended and is acceptable in a clinical setting.

By using a new software two consecutive laser treatments have been combined to correct the distance vision and to provide a near vision component in addition to the first treatment. This study will help us to answer 2 questions: How accurately this combined technique corrects distance and near vision Whether the correction is adequate to remove the complete need for supplementary near spectacles

This study seeks to evaluate the clinical performance of two daily disposable contact lenses.

The present study was designed to compare the use of mitomycin in PRK for the treatment of refractive errors and to compare these results to customized Lasik