Active clinical trials for "Astigmatism"

The investigational enVista IOL, Model MX60Tis equipped with toric optics and axis marks on the posterior surface to minimize the possibility of surgically induced astigmatism.

This study was conducted to evaluate the clinical performance of an investigational silicone-hydrogel lens against Senofilcon A toric lens. The study results were not used for design validation of the investigational product.

This study is evaluating the initial fit of toric contact lenses.

Primary Hypotheses: Senofilcon A will provide significantly less rotation with subjects in a recumbent position than Filcon II 3 monthly . Etafilcon A will provide significantly less rotation with subjects in a recumbent position than Filcon II 3 1 1 day . Etafilcon A will provide rotation with subjects a recumbent position non-inferior to nelfilcon A. A margin of 5 degrees will be used. Secondary Hypotheses: Senofilcon A will have significantly better monocular visual performance with subjects in a recumbent position than Filcon II 3 monthly. Etafilcon A for astigmatism will have significantly better monocular visual performance with subjects in a recumbent position than Filcon II 3 1 day. Etafilcon A will have monocular visual performance with subjects in a recumbent position non-inferior nelfilcon A. A margin of 0.05 LogMAR will be used.

This non-dispensing study is to evaluate the clinical performance of a test multifocal toric silicone hydrogel contact lens compared to a marketed multifocal toric contact lens (control).

Comparing LASIK outcomes using two femtosecond lasers

For patients undergoing cataract surgery, the purpose of this study is to evaluate a patient's far vision without glasses and quality of vision after implantation and UV treatment of the RxSight Light Adjustable Lens (RxLAL).Following completion of all light treatments, the patient's far vision without glasses and quality of vision will be assessed 6 months postoperatively.

The aim of this study was to test the hypothesis that OCT-guided 110 µm targeted flaps will result in accurate, predictable, and precise thickness flaps, with low complication rates when performed and compared using both 2D and 3D flap geometry applications and how it correlated to visual experience and quality of life responses during the early postoperative period.

The purpose of this study was to evaluate the clinical performance and subjective lens handling (insertion and removal) of two toric silicone hydrogel contact lenses after one month of daily wear each.

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.