Not a common cause of night blindness:: (A) Cataract, (B) RP, (C) Oguchi disease, (D) Pathological myopia
Answer is A. Cataract is not a common cause of night blindness. Other causes are more recognized causes. Causes of Night Blindness Vitamin A deficiency (first symptom is red-green differentiation anomaly) Pathological myopia Tapetoretinal degenerations{eg. Retinitis pigmentosa(RP)} Familial congenital night blindness Oguchi's disease