View clinical trials related to Visual Acuity.
Filter by:This is a multi-site, bilateral, dispensing, non-randomized, uncontrolled, unmasked, single arm study to evaluate visual acuity in neophytes.
The aim of this research is to find the effect of forward head posture correction on visual acuity and fatigue in low level visually impaired university students. Randomized controlled trials at Cecos University of IT and Emerging Sciences would be done. The sample size would be 48. The subjects would be divided in two groups, 24 subjects Intervention group and 24 in control group. Study duration would be 6 months. Sampling technique applied would be a non-probability convenience sampling technique. Only 18-25 years low level visually impaired university students with forward head posture would be included. Tools used in the study would be asthenopia questionnaire, Snellen chart and CVA angle photogrammetry
This is a single-site, prospective, single-arm, open-label, real-world evidence study with a minimal study duration of 1-year, up to 2-year follow-up to evaluate overall visual acuity.
The purpose of the study is to evaluate clinical and functional performance in real-world conditions in participants who have been implanted with Acrysof IQ Vivity (Extended Vision) IOLs compared with Alcon Aspheric Monofocal IOLs.
The conventional examination of the visual acuity (VA) does not take into account the patient's reading speed. However, the consideration of the speed for the recognition of the VA charts' symbols leads to the more accurate and comprehensive assessment of the visual capacity. Therefore, primary objective of this study is to develop and validate a new parameter for the more comprehensive evaluation of visual capacity: the critical visual acuity (CVA). CVA takes into account the speed of recognition of the symbols of the distance visual charts.
The investigator will take a mixed-methods approach to gather relevant information from both children or adolescents, and their parents on profiles of eye health, as well as routinely available indicators. This includes a series of baselining and follow-up analyses of cohort data collected on epidemiological, clinical, therapeutic, and service aspects of eye health and individual-level outcomes
MAIN OBJECTIVE: To assess the influence of residual astigmatism on visual acuity in the different lens foci in patients operated on for cataracts with a trifocal intraocular lens implant. SECONDARY OBJECTIVE: To study the influence of residual astigmatism on the visual quality of the patient in the far focus and to determine if there are differences of affectation in the two study groups.