It is a vascular lesion of the inner choroidal layer. The deep choroidal capillary layer has a network of branching vessels with terminal aneurysmal dilatation. The average age of onset is greater than that of age-related macular degeneration, but the age range of onset is greater, mostly in both eyes. Chronic recurrent acute plasma retinal and retinal pigment epithelial detachment may occur. It occurs around the optic disc, but can also occur in the macula, or even the periphery. Occasionally, large vesicular or plasma retinal total detachment with or without vitreous hemorrhage occurs. It can be treated with thermal laser photocoagulation.