Figure 4.

Colour fundus imaging (a), FAF imaging (b), and optimized-FAF (c) of (1) insulin dependent diabetes mellitus patient, diabetes duration 18 years; (2) noninsulin dependent diabetes mellitus patient, diabetes duration 30 years; (3) control subject with risk of developing diabetes mellitus; (4) control subject without risk of developing diabetes mellitus. Signs compatible with microaneurysms were represented by circle form, capillary dilation, haemorrhages, and hard exudates by square, triangle, and rhombus forms, respectively.