Correlation between hyperreflective foci and visual function testing in eyes with intermediate age-related macular...

Area of Science:

• Ophthalmology
• Medical Imaging
• Retinal Diseases

Background:

• Intermediate age-related macular degeneration (iAMD) is a significant cause of vision impairment.
• Intraretinal hyperreflective foci (HRF) are a key feature observed in iAMD.
• The clinical significance of HRF in relation to visual function requires further elucidation.

Purpose of the Study:

• To investigate the association between intraretinal hyperreflective foci (HRF) and visual function in patients with intermediate age-related macular degeneration (iAMD).
• To determine if specific characteristics of HRF correlate with visual performance deficits.

Main Methods:

• A retrospective, cross-sectional study involving iAMD patients.
• Spectral domain optical coherence tomography (SD-OCT) for HRF and drusen volume assessment.
• Comprehensive visual function testing including visual acuity (VA), low luminance VA (LLVA), quantitative contrast sensitivity function (qCSF), low luminance qCSF (LLqCSF), and mesopic microperimetry.

Main Results:

• Patients with HRF exhibited significantly worse VA, LLVA, LLqCSF, and microperimetry compared to those without HRF, even after adjusting for drusen volume.
• A composite endpoint indicated worse cone function in the HRF group.
• The number of HRF did not correlate with functional measures, but HRF separation from the RPE and shadowing were associated with low luminance deficit (LLD).

Conclusions:

• The presence of HRF is associated with diminished cone visual function in iAMD.
• These findings support the hypothesis that HRF indicate a more advanced stage of iAMD.
• HRF characteristics, such as RPE separation and shadowing, may be important indicators of visual impairment.