View clinical trials related to Refractive Errors.
Filter by:This is a prospective, comparative, randomized, controlled, open-label, single-surgeon, single-center PMCF clinical study whereby presbyopic patients undergoing refractive surgery will receive a SUPRACOR treatment for the correction in the non-dominant eye and a PROSCAN refractive treatment in the dominant eye to correct for ametropia. The participants will be randomized to either a SUPRACOR regular (100%) or SUPRACOR strong (130%) treatment with a 1:1 ratio.
A holographic optical coherence tomography (H-OCT) setup is used to detect the wavefront by means of phase reconstruction.
To compare the prediction error of ORA vs formula for post-LASIK cataract patients when PanOptix IOL was implanted. Using post-operative outcomes to determine if preoperative IOL calculations, including Barrett TK, Barrett Universal II, Hill RBF, ASCRS post-refractive calculator, or intraoperative aberrometry is more accurate when the two methods disagree in patients who have had previous refractive surgery undergo cataract surgery.
The primary objective of this study is to evaluate the overall performance of an investigational silicone hydrogel lens when compared to ACUVUE OASYS® with HYDRACLEAR® PLUS (AOHP).
The primary objective of this study is to evaluate the overall performance of PRECISION1 contact lenses when compared to Clariti 1-Day contact lenses.
The primary objective of this study is to evaluate the overall performance of PRECISION1 contact lenses when compared to Biotrue ONEday contact lenses.
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 objective of the current study is to prospectively evaluate 3-month clinical outcomes from LASIK performed using the Phorcides surgical planning software with Contoura topography-guided ablation in both eyes of subjects with myopia and myopic astigmatism seeking refractive surgery for distance correction.
Multifocal IOLs that maintain distance focus and improve near vision have been developed to reduce spectacle dependence.Multifocal IOLs improve patient performance of near-vision tasks, such as reading crafts, hobbies, and social activities to a greater extent than do monofocal IOLs. However, halos and reduced contrast sensitivity have been associated with multifocal IOLs and are common reasons for patient's dissatisfaction.Trifocal technology has been developed to create intermediate focus to overcome these difficulties. Continuous reports of the visual outcomes of the FineVision trifocal IOLs are encouraging.
The purpose of prospective cohort study is to estimate the rate of change in postoperative change after primary IOL implantation among children with congenital cataract(CC) and to explore key factors associated with the rate of change.