Active clinical trials for "Myopia"

The objective of this study is to evaluate the product performance of a new silicone hydrogel soft contact lens when worn by current soft contact lens wearers on a daily wear basis.

Age-related macular degeneration (AMD) is the leading cause of irreversible vision loss in developed countries among people over 50 years of age. Myopic maculopathy is also an important cause of irreversible vision loss. Reduced near visual acuity is still a major problem with all forms of AMD and myopic maculopathy. Various intraocular lenses for near vision (IOLs) or telescopic systems have been described but are not widely accepted and almost all solutions require phakic status of the eye and are implanted during cataract surgery. Therefore, these devices are not appropriated for pseudophakic AMD and myopic maculopathy patients. Scharioth Macula Lens (SML, Medicontur) is a magnifying intraocular lens for pseudophakic patients implanted in the ciliary sulcus in one eye of each patient. The implant has a bifocal optic, with a central 1.5mm diameter optical zone equivalent to +10D add and a peripheral zone optically neutral. The implantation of the add-on SML can improve the near visual acuity of pseudophakic patients with AMD and myopic maculopathy without impairing their distance visual acuity. The principal objective is to compare the near visual acuity, the far visual acuity and the self-reported vision health status before and after the SML implantation.

To demonstrate substantial equivalence of the new Silicone Hydrogel Soft Contact Lenses(SHSCL) to the commercially available ACUVUE® VITA™ contact lens

The IOL-capsular complex is formed after cataract surgery and intraocular lens (IOL) implantation.Early postoperative mechanical wrapping of the anterior and posterior capsules plays a significant role in preventing IOL decentration and tilt, as well as formation of the IOL-capsular complex which reduces the incidence of posterior cataract opacity. Capsular tension rings were first introduced in the early 1990s for loosening and tightening the lens bag and maintaining the equatorial contour of the bag after cataract surgery.Today, capsular tension rings of many different designs are in use.The capsular tension rings can be used in eyes with fragile and split zonular fibers, as well as pseudoexfoliation, high myopia, Marfan syndrome, mature cataract and lens subluxation.The capsular tension ring reduces the incidence of decentration and tilt of the IOL by reducing capsular contraction. In addition, multi-focus IOL implantation combine with capsular tension ring result in smaller high-order aberrations in our eyes compared to cataract surgery with multi-focus IOL implantation alone.For patients with high myopia, they often have a longer axial length and a larger capsule diameter, which reduces the rotational stability of the IOL and may lead to tilt ,decentration and displacement of IOL.Currently, there is no literature guidance to compare the results of cataract surgery combined with or without capsular tension ring implantation in patients with high myopia.Our hospital has Swept-source Optical Coherence Tomography ( SS-OCT,Casia2, TOMEY, Japan), which can accurately photograph the process of IOL capsule bending and the changes of lens position after cataract surgery. SS-OCT can be used to evaluate the influence of capsular tension ring on the dynamic changes of IOL-capsular complex in patients with high myopia after cataract surgery.

The objective of this study is to determine whether the remote monitoring of myopia patients with the EyeQue Insight (visual acuity test) can replace regularly scheduled follow-up visits.

The purpose of this study is to evaluate the clinical results of anti-VEGF intra-vitreal injections (IVT) in CNV secondary to pathologic myopia (PM-CNV).

The purpose of this study is to: determine the safety of wavefront guided PRK evaluate the efficacy of wavefront guided PRK evaluate the differences in visual quality after treatment of wavefront guided PRK

The goal of the study is to investigate relationship between the corneal response to a temporary increase in intraocular pressure and corneal mechanical properties.

The purpose of this study is to compare the subjective performance of comfilcon A lens against samfilcon A lens after 4 weeks of reusable lens wear.

Prospective, randomized, subject-masked 3-arm clinical study to assess the pediatric acceptability across three iterations of a novel spectacle lens design.