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Updated: Mar 30, 2026
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Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
Published on: February 23, 2024
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Functional Visual Acuity in Age-Related Macular Degeneration
Yohei Tomita1, Norihiro Nagai, Misa Suzuki
1*MD †MD, PhD Department of Ophthalmology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan (all authors).
Summary
A functional visual acuity (FVA) system effectively detects subtle vision changes in age-related macular degeneration (AMD) eyes. This system correlates with retinal anatomical changes seen in optical coherence tomography scans.
Area of Science:
- Ophthalmology
- Medical Imaging
- Visual Science
Background:
- Age-related macular degeneration (AMD) is a leading cause of vision loss.
- Early detection of subtle visual acuity changes is crucial for managing AMD.
- Conventional visual acuity (VA) tests may not capture early functional deficits.
Purpose of the Study:
- To evaluate a functional visual acuity (FVA) system's ability to detect subtle central visual acuity changes in age-related macular degeneration (AMD).
- To determine if FVA reflects pathological findings associated with AMD.
Main Methods:
- Twenty-eight patients with unilateral AMD underwent conventional VA, FVA, and contrast VA testing.
- Spectral domain-optical coherence tomography (SD-OCT) was used to assess retinal structure.
- Corneal and lens densities were measured; Schirmer test performed.
Main Results:
- FVA scores and visual maintenance ratios were significantly worse in AMD-affected eyes (p < 0.001).
- Contrast VA and conventional VA also showed significant worsening in AMD eyes (p < 0.01).
- Interdigitation zone disruption length on SD-OCT correlated with FVA scores (p < 0.01).
Conclusions:
- The FVA system detects subtle best-corrected VA changes in AMD eyes.
- FVA reflects interdigitation zone disruption, an anatomical change visualized by OCT.
- Further research is needed to establish the FVA system's full clinical value in AMD.
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