NCT04061343

The Effects of Changing Light Levels on Contrast Sensitivity in Patients With Glaucoma

The Effects of chaNging LIGHT Levels on Contrast sENsitivity in Patients With Glaucoma

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 115 (actual)
• Sponsor: Portsmouth Hospitals NHS Trust · Other Government
• Sex: All
• Age: 40 Years
• Healthy volunteers: Not accepted

Summary

The study is a prospective observational study where participants will be recruited from the Ophthalmology department (Outpatient department, Eye Casualty). Only one research visit will be required. Participants will be asked to fill in a set of questionnaires (Visual Functioning Questionnaire-15(61), Low Luminance Questionnaire(62)) assessing their quality of life and vision and their full medical history will be collected. Then they will have their contrast sensitivity tested under various light conditions. If a recent visual field test is not available, that might be performed as part of the study.

Detailed description

The purpose of our, real world study is to explore contrast sensitivity differences after changes in ambient light setting in patients with glaucoma compared with controls (patients with ocular hypertension). Participants will be asked to read a Pelli- Robson chart under photopic (bright light conditions) and mesopic (intermediate light conditions); followed by scotopic conditions (dim light conditions). This chart is a fast, easy, and effective way to measure spatial contrast sensitivity with reliable and reproducible results(60). This study will therefore help clinicians gain more insight into glaucoma related disability and provide a possible additional tool to visual field testing in patients with advanced glaucoma where VF testing may be hampered by floor effects.

Conditions

• Glaucoma

Timeline

• Start date: 2018-11-20
• Primary completion: 2021-03-16
• Completion: 2021-03-16
• First posted: 2019-08-19
• Last updated: 2023-04-07

Locations

1 site across 1 country: United Kingdom