Quantification of Glare Effect by VA Methodology - Validation Study
Research type
Research Study
Full title
Quantification of Glare Effect by A Novel Visual Acuity Methodology - Validation Study
IRAS ID
258957
Contact name
Ruchi Gupta
Contact email
Sponsor organisation
OCULAR TECHNOLOGY GROUP - International
Duration of Study in the UK
0 years, 8 months, 24 days
Research summary
The most commonly quoted visual disturbances are halo, which is defined as the perception of bright rings around a bright light source, and disability glare, that is the reduction in vision that is noticeable around a bright source within the visual field. These disturbances are most relevant for distance vision night conditions, such as distracting street lights and car headlights. Traditionally, these disturbances have been recorded via patient reported outcome (PRO) assessments and not measured. OCULAR TECHNOLOGY GROUP – International (OTG-i) has previously developed and tested a computer-based vision testing that allows the measurement of visual performance under controlled test contrast, luminance and exposure time. A new test has been added that includes multiple glare sources surrounding the letters.
The purpose of this study is to quantify the glare effect using the OTG-i Vision Glare Module and to establish its repeatability and sensitivity with an induced optical compromise (blur). The study will measure vision with and without glare while the participants are viewing a distance chart positioned at 4m with medium contrast and low lighting. The participants will read 10 random letters of varying sizes they see on the chart. One set of test will be done at the participant's own pace while another set will be done with a controlled time.REC name
London - South East Research Ethics Committee
REC reference
18/LO/2218
Date of REC Opinion
7 Jan 2019
REC opinion
Favourable Opinion