View clinical trials related to Myopia.
Filter by:Our study has three parts has three parts, and the main aim of the study is to find out if corneal hysteresis was associated with myopia or even a predictor of myopia poor control predictor: - Part 1 of our study: patients with anisomeropia whose spherical equivalent refraction as measured by cycloplegic autorefraction between the two eyes differ greater than 1.5 D. - Part 2 of our study: Minus spherical equivalent refraction as measured by cycloplegic autorefraction. - Part 3 of our study: patients with minus spherical equivalent refraction as measured by cycloplegic autorefraction who are under regular atropine for the treatment of myopia;patients who are prescribed with atropine treatment are in need of myopia control instead of for research interest
This research project will compare two methods of correcting refractive error (long or short-sightedness) with spectacle lenses. The primary outcome is the proportion of the population requiring spectacle correction who's needs are met through each scheme. Secondary outcomes are the cost effectiveness of these schemes and development of guidelines for identification of those amongst the population suitable for 'ready-made' spectacles. There are two sites involved in this research. Those with uncorrected refractive error will be identified by their distance vision. Those who have impaired vision (at least 20/40) which improves with spectacles will be invited to participate in this research. Participants will be randomly allocated to one of two groups. The first group will receive spectacles with full correction in both eyes and the second group will receive spectacles from a limited inventory. The two schemes will be compared by how many people continue to use the spectacles, vision with the new spectacles, change in the level of visual functioning and quality of life after wearing new spectacles for one month. At the one month visit, if the spectacles provided are not useful, one new pair of custom spectacles will be dispensed.
The objective of this study is to evaluate the performance of the PureVision Contact Lens compared to Acuvue Oasys Contact lens and O2Optix Contact lens when worn on a daily wear basis.
This study seeks to evaluate the clinical performance of a recently released contact lens designed to correct astigmatism to an established contact lens that has historically been used in these patients.
The purpose of this study is to examine the effect of the myopic optical defocus on the Humphrey Matrix 30-2 test.
This study seeks to evaluate the clinical performance of a new CE marked daily disposable contact lens that contains a wetting agent to a recently improved daily disposable contact lens.
The purpose of this study is to assess whether a short-term imposed myopic defocus is effective in preventing the development and progression of juvenile-onset myopia in Chinese children.
To evaluate the effect of PEG-400 and Systane on quality of vision after LASIK.
This study seeks to evaluate the clinical performance of a recently improved daily disposable contact lens to an established daily disposable contact lens that contains a wetting agent.
To assess the effect of oral administration of the alga Dunaliella bardawil containing approximately 50% all-trans beta-carotene and 50% 9-cis beta-carotene isomers on visual functions patients with Congenital Stationary Night Blindness {Fundus albipunctatus).