[Diagnosis of chronic retinal detachment following the discovery of a crystalline retinopathy].

Crystalline retinopathy is a rare complication of chronic retinal detachment. The observation of crystalline retinal deposits should prompt the search for a chronic retinal detachment. The composition of these crystals is unknown. Some other crystals can be found in other diseases or with drug toxicity. It is essential to make the differential diagnosis and to determine the actual etiology