An exploratory study to evaluate visual function endpoints in non-advanced age-related macular degeneration

Area of Science:

• Ophthalmology
• Vision Science
• Medical Diagnostics

Background:

• Early detection of retinal dysfunction is crucial to prevent irreversible vision loss in age-related macular degeneration (AMD).
• Identifying visual dysfunction before structural damage occurs is key for effective AMD management.
• This study evaluates visual function tests for detecting early AMD-related visual impairment.

Purpose of the Study:

• To evaluate a series of visual function tests for their ability to detect visual dysfunction in non-advanced age-related macular degeneration (AMD).
• To identify potential new endpoints for clinical trials studying early AMD.
• To compare the efficacy of novel visual tests against established ones in detecting early AMD.

Main Methods:

• Visual function tests were administered to 23 non-advanced AMD subjects and 34 age-matched normal controls.
• Tests included standard ETDRS visual acuity (VA), low luminance (LL) ETDRS VA, MNREAD, and novel tests: Ora-VCF™ and Ora-tablet reading test.
• Test-retest repeatability and reproducibility were assessed on a subset of participants.

Main Results:

• Standard ETDRS VA, LL 2.0 ETDRS VA, and MNREAD showed no significant differences between non-advanced AMD and normal groups.
• The Ora-VCF™ test revealed significantly worse performance in the non-advanced AMD group compared to controls (p=0.005).
• The Ora-tablet reading test with LL 2.0ND also showed significantly reduced reading speed in the AMD group (p=0.049).
• Repeatability and reproducibility for Ora-VCF™ and Ora-tablet LL 2.0ND were high (82-92%).

Conclusions:

• Established tests like ETDRS VA and MNREAD failed to differentiate non-advanced AMD from normal vision.
• The Ora-VCF™ test and Ora-tablet LL 2.0ND reading test demonstrated significant visual dysfunction in early AMD.
• These novel tests show promise as sensitive endpoints for future AMD clinical studies.