CORRELATION STUDY BETWEEN DRUSEN MORPHOLOGY AND FUNDUS AUTOFLUORESCENCE

Area of Science:

• Ophthalmology
• Medical Imaging
• Retinal Diseases

Background:

• Age-related macular degeneration (AMD) is a leading cause of vision loss.
• Intermediate AMD is characterized by drusen and outer retinal changes.
• Autofluorescence (AF) imaging provides insights into retinal pigment epithelium function.

Purpose of the Study:

• To correlate drusen morphology and outer retinal status with autofluorescence (AF) imaging.
• To investigate imaging biomarkers for nonexudative age-related macular degeneration progression.

Main Methods:

• Multimodal imaging including color fundus photography and spectral-domain optic coherence tomography (SD-OCT).
• Analysis of drusen morphology, AF characteristics, and outer retinal structural integrity (ELM, EZ, RPE/Bruch membrane).
• Spearman's correlation coefficient used to assess relationships between imaging features.

Main Results:

• 228 drusen analyzed from 53 patients; 130 soft and 98 cuticular drusen.
• 60% isoautofluorescent, 35% hyperautofluorescent, 5% hypoautofluorescent drusen.
• Positive correlation found between drusen AF and hyperreflective foci (r=0.4). Outer retinal morphology also correlated with AF findings (r=0.3).

Conclusions:

• Multimodal imaging reveals diverse ultrastructural changes in drusen.
• Drusen morphology and AF findings are correlated, suggesting potential progression biomarkers.
• Further research needed to identify cofactors influencing AMD progression.