Fig. 79. Choroidal rupture. A. A circumlinear area of depigmentation is present between the fovea and optic disc in this case of blunt trauma to the eye. The abnormality was present immediately after the injury. Subretinal hemorrhage is present inferiorly. B. After 1 year, reactive retinal pigmentation hyperplasia has occurred in the region of the injury. Retinal pigment reaction is also present in the area of the former subretinal hemorrhage inferiorly. C. Rupture of Bruch's membrane and adjacent choroidal structures is present in the region of clinical depigmentation. Retinal pigment hyperplasia will begin in the region of surrounding viable retinal pigment epithelium. This region is also vulnerable to subretinal neovascularization. The overlying retina is usually not ruptured but is clinically nonfunctional.(Hematoxylin-eosin stain; × 28.)