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Impact of Positive & Negative Lens-Induced Defocus on Contrast-Sensitivity in Myopic & Non-Myopic Adults
Sponsor: Superior University
Summary
examines the influence of lens-induced defocus on contrast sensitivity-a crucial aspect of visual performance.Each participant experiences both positive and negative defocus through different lenses, with measurements taken for contrast sensitivity using the Pelli-Robson chart. Outcomes are evaluated at baseline, 2 weeks, and 4 weeks to understand the effect of defocus over time.
Key Details
Gender
All
Age Range
18 Years - 50 Years
Study Type
INTERVENTIONAL
Enrollment
36
Start Date
2024-02-28
Completion Date
2025-03-01
Last Updated
2024-12-31
Healthy Volunteers
Yes
Conditions
Interventions
Positive Lens-Induced Defocus Using Spectacle Lenses (+2.00 D) for Myopic Participants
Intervention Description: This group will be exposed to positive defocus induced by +2.00 D spectacle lenses. The lenses are designed to create optical blur to evaluate the effects on contrast sensitivity and visual fatigue. Measurements will be conducted at baseline, 2 weeks, and 4 weeks after exposure to assess changes in visual function."
Negative Lens-Induced Defocus Using Spectacle Lenses (-2.00 D) for Myopic Participants
Intervention Description: This group will be exposed to negative defocus induced by -2.00 D spectacle lenses. The induced defocus will allow for the evaluation of its impact on contrast sensitivity and visual fatigue. Assessments will be carried out at baseline, 2 weeks, and 4 weeks."
Positive Lens-Induced Defocus Using Spectacle Lenses (+2.00 D) for Non-Myopic Participants
ntervention Description: This group will undergo positive defocus using +2.00 D spectacle lenses. The intervention aims to examine the effect of induced defocus on contrast sensitivity and visual fatigue in non-myopic participants. Data will be collected at baseline, 2 weeks, and 4 weeks."
Negative Lens-Induced Defocus Using Spectacle Lenses (-2.00 D) for Non-Myopic Participants
Intervention Description: This group will experience negative defocus induced by -2.00 D spectacle lenses. The purpose is to evaluate how negative lens-induced defocus affects contrast sensitivity and visual fatigue in non-myopic participants. Measurements will be taken at baseline, 2 weeks, and 4 weeks.
Locations (1)
Tehsil Headquarters (THQ)
Taunsa, Punjab Province, Pakistan