Dark adaptation test of the patient. Fundus photographs of the patient before (A) and after (B) dark adaptation. The fundus appearance was characteristic of Oguchi disease with grayish-yellow discoloration that had normal appearance after 2–3 h of dark adaptation. | Waheed, N. K., Qavi, A. H., Malik, S. N., Maria, M., Riaz, M., Cremers, F. P., Azam, M., & Qamar, R. (2012). A nonsense mutation in S-antigen (p.Glu306*) causes Oguchi disease. Molecular vision, 18, 1253–1259.