Pilot Study on Visual Function and Fundus Autofluorescence Assessment in Diabetic Patients

Area of Science:

• Ophthalmology
• Medical Imaging
• Diabetology

Background:

• Diabetic retinopathy (DR) is a leading cause of vision loss.
• Early detection of DR is crucial for effective management and prevention of blindness.
• Conventional color fundus imaging may not detect subtle early DR changes.

Purpose of the Study:

• To evaluate optimized fundus autofluorescence (FAF) imaging for detecting early diabetic retinopathy (DR).
• To compare FAF findings with conventional color fundus imaging.
• To assess the relationship between imaging findings and visual function in diabetic patients.

Main Methods:

• FAF and color fundus images were acquired using a CR-2 Plus digital nonmydriatic retinal camera.
• Seven diabetic patients and thirteen control subjects participated in the study.
• Visual function was assessed using the VFQ-25, DSMQ, and Contrast Sensitivity Function (CSF) tests.

Main Results:

• Optimized FAF and FAF imaging revealed more retinal alterations related to DR than color imaging.
• Microaneurysms, capillary dilations, and hemorrhages were less frequently observed in color images compared to FAF.
• Retinal pigment epithelium defects were more prevalent in control subjects at risk for diabetes.

Conclusions:

• FAF and optimized FAF imaging are superior to color imaging in detecting early DR-related alterations.
• FAF imaging serves as a valuable complementary tool for early DR detection and monitoring.
• FAF can identify subtle retinal changes not visible with conventional imaging methods.