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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 most common cause of retinal detachment is tiny breaks developing inside the retina. The breaks allow the fluid found between the retina and the lens of the eye to leak underneath the retina. A build-up of fluid can cause the retina to pull away from the blood vessels that supply it with blood.