Active clinical trials for "Hyperopia"

Corneal disease is a leading cause of blindness in the world. A shortage of corneal donor tissue has prevented many patients from regaining vision. Additionally, refractive error such as myopia is a major cause of impaired visual function worldwide. Although refractive error is correctable by procedures that modify the refractive power of the cornea, these procedures often weaken corneal integrity and have risk of complications. This study aims to evaluate the safety and efficacy of corneal surface epithelium repair and regeneration in the treatment of corneal surface diseases and refractive error using autologous limbal stem cell transplantation.

Randomized, bilateral, cross-over dispensing study of a standard and VR800 refraction and associated spectacle lenses.

Correlating the accuracy of a refraction done over telemedicine to that of a standard refraction, with a study hypothesis that the results will be equivalent.

This study is aimed at examining the BCVA from try-on glasses constructed from measurements from the EyeQue VisionCheck.

Axial hyperopia results when the length of the eye is too short for the eye to properly focus distance objects on the retina while the focusing system is relaxed. Emmetropization is the process by which the eye actively adjusts various components of the eye to gradually improve the focus of the eye. Emmetropization frequently involves either an increase or a decrease in the growth of the eye, particularly during infancy and childhood. Numerous animal studies suggest that if an animal is exposed to retinal images located behind the retina either centrally or peripherally, the eye will grow in the direction of the focused image. If an abnormally short eye has resulted in hyperopia, exposing such an eye to retinal images partially located behind the retina might encourage axial elongation, thus reducing the hyperopia.

The purpose of this study is to evaluate worn AIR OPTIX® plus HYDRAGLYDE® (AOHG) lenses cleaned and disinfected with HYDRAGLYDE® containing lens solutions compared to each of the control habitual silicone hydrogel (SiHy) lenses cleaned and disinfected with habitual multi-purpose solution (MPS) for cholesterol uptake.

The clinical investigation objective is to evaluate safety and performance outcomes of trifocal IOL implantation to improve vision in patients with cataract and/or ametropia (hyperopia, myopia) and/or presbyopia. Retrospective data from preoperative status up to 12 month postoperative status will be collected from patients that were implanted with Medicontur's 640PM intraocular lens: Preoperative status: Preoperative Screening and Baseline Surgery: IOL implantation M1: 1 month +/- 2 weeks postoperative follow-up M3: 3 months +/- 1 month postoperative follow-up M12: 12 months +/- 3 months postoperative follow-up

The principal aim of this project is to determine the time course of development of contact lens and contact lens case contamination during daily wear of silicone hydrogel lenses. The secondary aim of the study is to determine whether the time course of development of contact lens and contact lens case contamination varies between two different contact lens care systems.

Analysis corneal and refractive stability of hyperopic laser-assisted in situ keratomileusis (LASIK) with and without concurrent prophylactic high-fluence cross-linking (CXL).

Open label, 1-week daily disposable, dispensing study