Optimal Strategy in Using the Blue Field Simulation Technique for the Measurement of Macular Blood Flow

Abstract

The blue field entoptic phenomenon allows the observation of one’s own white blood cells passing through macular capillaries. Under optimal conditions of uniform retinal illumination with blue light (λ = 430 nm) many tiny corpuscles are seen randomly moving in all directions throughout the visual field. They recurrently procede along the same, albeit invisible, curved pathways prescribed by the inner retinal capillary loops. They feature a bright “head” and a dark “tail” and move in rhythmic accelerations synchronous with the heart cycle.