View clinical trials related to Refractive Error.
Filter by:This study seeks to evaluate the clinical and subjective performance of two established soft contact lenses.
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.
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.
This is a research study designed to test the utility of D-shaped bifocal lenses and PRIO Computer Lenses for persons using a computer. We hypothesize that lenses specially designed for computer use may allow more comfortable and productive work on a computer.
The purpose of this clinical trial is to determine if interventions within the nursing home to restore vision, or cope with visual loss, in residents with visual impairment result in improvement or less decline in mobility scores, and socialization scores, compared to residents with visual impairment in nursing homes with no such intervention. The investigators hypothesized that nursing home residents with visual loss who receive cataract surgery, or refractive correction, or low vision aids would have have better socialization scores and mobility scores at 6 months and 12 months compared to nursing home residents with visual impairment who are advised to seek services, but have no specific program.
The primary purpose of this study is to evaluate whether interventions to improve vision in nursing home residents have an impact on residents' health-related quality of life. The interventions being evaluated are correction of refractive error (near-sightedness, far-sightedness, presbyopia) and cataract surgery.
A thorough ophthalmic examination of a child must include a refraction and this is often done with cycloplegia. In our study, we aim to determine at which age group a non-cycloplegic refraction technique closely correlates with a cycloplegic refraction and hence, would obviate the need for cycloplegic refraction in our routine clinical practice.
The aim of this study is to examine the relationship between optical blur from poor refractive corrections (glasses) of workers using computers and their productivity and comfort in the workplace. We believe that improving the visual status of subjects who use computers will have a beneficial effect on productivity and visual comfort.
To identify vision-screening tests that can accurately predict those three- and four-year old preschoolers who would benefit from a comprehensive vision examination because of signs of amblyopia, strabismus, and/or significant refractive error.