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Retinal cysts as in cystoid macular edema occur in the center, cause blurring and are due to inflammation, usually after surgery. Cysts in the peripheral retina are quite normal and are sometimes called cystic retinal tufts. Occasionally, cystic tufts can be torn by acute vitreous separation causing a retinal tear which may be lasered to prevent detachment. ...
The common causes of retinal neovascularization on or near the optic disc are diabetes, retinal vein occlusion, and radiation. Neovascularization in the peripheral retina (out of view of the direct ophthalmoscope) is most commonly caused by sickle cell disease and retinopathy of prematurity.