This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Ophthalmology
Which of the following is specific for albinism among the following? 
Select and explain. 
A. Red reflex, B. Decreased visual activity, C. Photophobia, D. Nystagmus
A: Red reflex
Answer: A: Red reflex 
Explanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 467 - 474) *All the given options are seen in albinism. But, a red reflex is specific *Ocular features in albinism: Red reflex Pink or blue iris Dazzling glare Photophobia Decreased vision Nystagmus Clear retinal and choroidal vessels, separated by glistening white space Strabismus (mild to moderate) Ocular albinism type 1 (OA1) There is usually nystagmus - OA can otherwise be difficult to detect in women, although it tends to be more obvious in men. There is also a red pupillary reflex (pupils appear greenish to bluish-red) with depigmented fundus and prominent choroidal vessels and photophobia.