View clinical trials related to Myopia.
Filter by:This study was aimed to evaluate the effects of different Orthokeratology，including the size of central optical zone and the height of peripheral reverse curve, on myopia control and visual quality.
Objective: To study the effectiveness and safety of low-intensity single wavelength red light in controlling high myopia in children and adolescents. Methods: Subject population: Children aged 3-16 years who have high myopia. Sample size: 190 subjects were planned to be enrolled and assigned to the test or control group in a 1:1 ratio.
This is a randomized controlled trial to investigate the effect of capsular tension ring (CTR) implantation on intraocular lens (IOL) tilt and decentration in cataract patients with high myopia.
This is a multi-center, randomized, double-masked clinical trial. All study devices are market approved/cleared in the localities where the study is conducted. Subjects will be randomly assigned to wear NaturalVue Sphere single vision contact lenses (SVCL) or NaturalVue Multifocal (NVMF) soft contact lenses for a total of three years.
This trial aims to test the effectiveness and practicality of study in the Bright Classrooms with skylight and artificial light renovation in reducing incident myopia in Chinese primary school children over three years, as compared to children studying in conventional classrooms.
The purpose is to compare the myopia control efficacy of Ortho-K lenses (OKL) and Defocus (DIMS) spectacles in Danish myopic children aged 6-12 years. It is a clinical randomized non-inferiority trial, where the participants are randomly assigned to either OKL or DIMS spectacles. The participants are followed during 18 months of therapy. The hypotheses: - There is no statistically significant difference between the myopia control efficacy between OKL and DIMS spectacles. - Larger pupil size is positively correlated to treatment efficacy for both devises. - Increasing choroidal thickness during early treatment is positively correlated to treatment efficacy for both devises. - There is no difference in vision related quality of life between the two groups.
The study aims to examine how the vascular layer of the eyeball (choroidal layer) responds when part of the visual field is exposed to specially generated visual stimulus. The study goal will be accomplished by producing specific blur visual stimulus at a particular visual field position and measure any consistent thickness change pattern in the choroidal layer. We propose to test the hypothesis that regional changes in the choroidal thickness may be induced differently after short-term exposure to specific visual stimuli.
Some parameters, such as a change in the optic tilt and axial decentration, can affect the optical characteristics of intraocular lenses (IOLs) in postoperative period, which leads to residual refractive errors and other complications. The stability of the intraocular lens in the eye is largely dependent on the mechanical design of its haptic support elements. Thus, the new Clareon IOL has a flat haptic with a flexible design that minimizes axial changes and allows the IOL to maintain a stable position in a given plane during compression. Currently there is no published data of the stability for Clareon AutonoMe IOL for long eyes. The purpose of the current study is to evaluate and compare the axis displacement and stability of optical tilt, visual and refractive results in patients after implantation of two different models of intraocular lenses: Clareon AutonoMe (Alcon, USA) and Hoya iSert 251 (Japan) in the long-term postoperative period (after cataract surgery).
This cohort study aimed to assess the change of refractive status in Chinese school children.
The objective of the study is to evaluate the clinical performance of two monthly silicone hydrogel contact lenses in habitual wearers of frequent replacement (FRP) lenses when worn for one month.