Man, these guys are brilliant. Fundus autoflourescence (FAF) comes from the RPE, so RPE blocked by retinal vessels are “dark adapted”. So when the retina is re-attached, if the retina is not placed exactly where it was before, one will see a “shadow” of autoflourescence next to the displaced retinal vessel, when ordinarily it would be hidden behind the retinal vessel. Confused? Doesn’t matter- read all about it in January’s Ophthalmology