FEVR is a rare inherited retinal disease characterized by abnormal angiogenesis. First reported by Criswick and Schepens in 1969. Disease can be autosomal dominant, recessive, or X-linked recessive
RGCs are neurons located near inner retina surface. Each RGC receives input from about 100 rods and cones. About 0.7-1.5 million RGCs exist in human retina. RGCs transmit visual information to thalamus, hypothalamus, and midbrain
Branches from ophthalmic artery, running inferior to optic nerve. Approximately 160 micrometres in diameter. Forms from proximal part of hyaloid artery after canal formation
OCT-A is a non-invasive technique for imaging retina and choroid microvasculature. Uses laser light to depict vessels without injectable dyes. Employs SD-OCT (800nm) or SS-OCT (1050nm) wavelengths. Produces 3mm2 to 12mm2 images segmented into four zones
Afterimage is an image that continues to appear after exposure to original stimulus. Can be normal (physiological) or pathological (palinopsia). Occurs due to photochemical activity in retina continuing after stimulus
Photopsia can cause flashes of light, streaks of lightning, or stars. Common causes include retinal detachment, vitreous detachment, and diabetic retinopathy. Some medications like digoxin and chloroquine can trigger flashes