Undulations of the choroid and the overlying structures.
Causes
Most commonly idiopathic.
Others include hyperopia, choroidal tumor or detachment, choroidal neovascular membrane, optic disk swelling, orbital tumors, scleral buckle, hypotony, orbital and scleral inflammation.
Clinical Features
Symptoms:
Maybe asymptomatic
Blurry vision
Metamorphopsia if the folds run through the fovea
Signs:
Unilateral or bilateral folds that produce alternating dark and light yellowish streaks on the posterior pole are observed using ophthalmoscopy
May have horizontal, oblique or vertical orientation that are parallel to each other or may have an irregular or radiating pattern
Fluorescein Angiography
Alternating hypo- and hyperfluorescent lines correseponding to the folds orientation that persist throughout all phases of the study
The hypofluorescent lines correspond to the dark bands where the RPE cells are compressed in the valleys or troughs of the folds
The hyperfluorescein lines correspond to the light bands where the Bruch's membrane and RPE cells are stretched on the peak of the folds
