View clinical trials related to Myopia.
Filter by:Corneal asphericity is expressed numerically as the "Q-value". A minus value means that corneal curvature flattens towards the periphery and the cornea is prolate in shape, but when the curvature steepens towards the periphery, the cornea is oblate in shape and has a positive Q-value. The current study evaluates the effect of LASIK eye surgery on corneal asphericity by comparing 2 software treatment platforms; the Q value customized ablation versus the conventional Wave-front optimized ablation in a fellow eye study pattern.
The objective of the study is to measure the difference in the lag of accommodation between DOT spectacle lenses and control spectacles.
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.
In order to provide reference for clinical application, the normal values of retinal blood flow parameters in Chinese healthy children were measured by oct-angiography. Meanwhile, the repeatability and consistency of retinal blood flow parameters measured by oct-angiography in children were further analyzed, and the correlation of retinal blood flow parameters with eye axis, choroidal thickness, age and diopter was analyzed, so as to provide basis for clinical diagnosis of children's ophthalmopathy. Objective to study the effect of short-term optical defocusing on retinal blood flow parameters, and analyze the correlation between the changes of posterior segment parameters before and after short-term optical defocusing, so as to provide the basis for the possible compensation mechanism of posterior segment optical defocusing, and further understand the possible physiological mechanism of myopia.
The main objective of the study is to refit existing soft lens wearers with two different daily disposable contact lens types, Lens A and Lens B, to determine their performance after one week of wear.
To investigate the relationship between axis length (AL) and refractive error. eyes of low hyperopia to emmetropia subjects, comprising eyes with moderate to high myopia (-11.00D ≤ SE ≤ -4.00D) were analyzed in this cross-sectional study. Cycloplegic refractive error was measured with the autorefractor, AL was measured with the IOL master. Association between AL and refractive error were evaluated by linear regression analysis. The mean of AL and its correlation with SE, sex, and age were evaluated.
The aim of this study was to explore satisfaction with vision correction and ease of use of PFM (Personal Face Masks) in a group of spectacle wearers who were randomised to continue wearing spectacles or be fitted with daily disposable contact lenses.
Non-pathological high myopia patients and controls undergoing a comprehensive ophthalmologic examination are included. The Optical Coherence Tomography Angiography (OCTA) software automatically segments these full-thickness retinal scans into the superficial and deep inner retinal vascular plexuses, outer retina, and choriocapillaris (CC). The vascular density in the superficial and deep retinal vascular zones is calculated automatically by the software, and the foveal avascular zone (FAZ) and foveal density (FD) are also automatically determined. Choroidal thickness is calculated manually by two retinal specialists, and the average value was used.
This project is a single-center, prospective, self-controlled clinical study. It intends to select patients with simple medium and low degree myopia as subjects, and apply 650nm low-energy red light irradiation to the retina to observe its effect on macular microcirculation.
To evaluate the changes that occur in the corneal indices after corneal refractive surgery either PRK or LASIK.