Purpose: To report an Iranian patient with diagnosis of Oguchi disease associated with diabetic retinopathy.

Methods: A 50-year-old diabetic woman with night blindness was referred to our clinic. Complete ophthalmic examination including ophthalmoscopy after dark adaptation and paraclinic evaluations such as fluorescein angiography and electroretinography were performed.

Results: In the both eyes, retinal neovascuarizaion and preretinal hemorrhages compatible with high-risk characteristic proliferative diabetic retinopathy were observed. In addition, a golden yellowish discoloration of posterior pole was noted in her both eyes. The diagnosis of Oguchi disease was made when this discoloration disappeared after dark adaptation for 3 hours. Electroretinograms also confirmed the diagnosis by showing a slow negative wave followed by a slow positive wave in the photopic condition and absent a- and b-waves in the scotopic state.

Conclusion: Proliferative diabetic retinopathy may occur in a patient with Oguchi disease. This report represents this association in an Iranian patient for the first time.