- 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
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