View clinical trials related to Myopia.
Filter by:This study is for testing the efficacy and safety of distance-image screens for preventing myopia in children for 12 month. Each subjects would be asked to paired test the ocular parameters between before and after 12-month distance-image screens.
This is a 3-visit, single site, observational clinical study to evaluate the characterization of the central and peripheral wavefront aberration profiles in pediatric myopic subjects.
Small incision lenticule extraction (SMILE) is a refractive intrastromal procedure for myopia and myopic astigmatism correction. Most of the studies evaluating astigmatic correction by SMILE reported astigmatic under-correction, especially in high degrees of astigmatism. This under-correction could be due to: first, the active eye tracker or the iris registration is not yet available to overcome the cyclotorsion that occurred during the treatment with the VisuMax femtosecond laser system (Carl Zeiss Meditec, Jena, Germany) which could be overcome by manual compensation technique, especially in higher degrees of cylinders (> 1.5 diopters (D)). Second, in patients with small lenticule diameters, the more abrupt change in thickness at the edge of the treated area could induce more stromal and epithelial healing in this area. Thus, the astigmatic correction would be less effective with small than large lenticule diameters for similar high preoperative astigmatism. This study assessed the outcome of using a 0.5 millimeter (mm) larger lenticule diameter in the fellow eyes of myopic astigmatic correction SMILE participants. This assessment included the safety and effectiveness indices, the refractive and visual outcomes, the contrast sensitivity, and some morphological outcomes such as corneal curvature and epithelial and corneal thickness.
Software refraction in the mobilerone for myopia and astigmatism is a novel medical device for myopia adults and elder children with or without astigmatism. And the investigators would like to test its accuracy and efficacy as well as safety.
Near work-induced transient myopia (NITM) is an important factor in permanent myopia (PM) development and progression. Atropine eye drop is beneficial in reducing initial NITM and slowing down myopic progression.Participants were randomly assigned in a 1:1 ratio to receive 0.01% atropine or placebo eye drop once nightly bilaterally for one year. Initial NITM, cycloplegic refraction, axial length (AL), best-corrected visual acuity (BCVA), intraocular pressure (IOP), and pupil diameter will be measured at baseline, 4-week, 12-week, 24-week, 36-week, and 48-week. Visual Function Questionnaire was administered at baseline and each follow-up visit. Adverse events also will be monitored and documented at each subsequent follow-up visit. This study investigates the efficacy of 0.01% atropine in the treatment of NITM and its possible association with the progression of refractive change in Chinese myopic children.
This is a conventional efficacy trial to validate the results from previous clinical trials for younger children; the 12-month efficacy results will be used to predict the 3-year treatment efficacy. This is a randomized, controlled (1:1), multisite, subject- and observer-masked, 2-arm parallel group study.
To evaluate whether there is a difference in subjective and objective fit of soft lenses with different sagittal height
The study intended to observe the changes in the quality of life, behavior, and eye habits of children and adolescents aged 8-18 years before and after orthokeratology, as well as the differences in the quality of life and behaviors of different myopic groups after keratoplasty, using the EQ-5D-Y, CHU9D, and CHROME-G scales with the use of a self-assessment method.
This trial is an observational cohort study. Patients aged 8-15 years with symptomatic convergence insufficiency and 150 patients with symptomatic convergence insufficiency who had not received visual training were selected from the Tianjin Eye Hospital Optometry Center and received 1 course of visual training treatment. Self-assessment and other assessments were combined, and the patient and guardian questionnaires were collected. The EQ-5D-Y and CHU9D scales were used to evaluate Chinese patients' health-related quality of life with symptomatic convergence insufficiency. The feasibility of the EQ-5D-Y and CHU9D scales in assessing the health-related quality of life of Chinese patients with symptomatic convergence insufficiency was analyzed. To assess the effectiveness of visual training on visual symptoms and improvement of quality of life in patients with symptomatic convergence insufficiency
This double-blind, randomized controlled clinical study is to evaluate the effectiveness and safety of low concentration atropine in preventing myopia in pre-myopia children, and to explore whether there is a dose effect relationship between different concentrations of atropine in preventing myopia.