Heterogeneous Visual Function Deficits in Intermediate Age-Related Macular Degeneration: A MACUSTAR Report

Area of Science:

• Ophthalmology
• Medical Research

Background:

• Age-related macular degeneration (AMD) is a leading cause of vision loss.
• Understanding visual function deficits in different AMD stages is crucial for patient care and research.

Purpose of the Study:

• To compare visual function across AMD disease stages.
• To determine if intermediate AMD (iAMD) patients exhibit diverse visual deficits using reference limits from healthy individuals.

Main Methods:

• Cross-sectional analysis of visual function tests in 585 iAMD patients and controls.
• Tests included best-corrected visual acuity (BCVA), low luminance visual acuity (LLVA), contrast sensitivity (PR-CS), and reading speed (SPS).
• Reference limits were established from participants without AMD.

Main Results:

• Early AMD showed worse reading speed (SPS).
• Intermediate AMD (iAMD) and late AMD showed significant reductions in most visual functions compared to controls.
• A substantial proportion of iAMD patients exceeded reference limits for multiple visual tests, indicating heterogeneous deficits.

Conclusions:

• A significant number of individuals with structurally defined iAMD experience varied visual function impairments.
• These heterogeneous deficits in iAMD may necessitate tailored approaches in clinical trial design and patient selection.