Night blindness mainly occurs due to interference with the functions of rods owing to deficiency of visual purple. All of the following are causes of night blindness, EXCEPT:: (A) Vitamin A deficiency, (B) High myopia, (C) Eales disease, (D) None of the above
Answer is C. Poor or feeble vision in twilight or in night is known as night blindness or nyctalopia. Causes of night blindness: Xerophthalmia Retinitis pigmentosa High myopia Advanced open-angle glaucoma Disseminated chorioretinal atrophy Oguchi's disease Congenital night blindness Ref: Textbook of Ophthalmology By H V Nema, Nitin Nema, 2012, Page 346.