This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
In unilateral Afferent pupillary defect, when light is moved from normal to affected eye, there is - 
Select and explain. 
A. Dilatation in affected side and constriction in normal eye, B. Dilatationin normal eye andc onstriction in affected side, C. Dilatation in both pupils, D. Constriction in both pupils
C: Dilatation in both pupils
Answer: C: Dilatation in both pupils 
Explanation: Affetent signals don&;t reach the brain, so expected pupillary constriction will not be seen on the affected eye on showing the light. Normal eye will dilate. So both eyes dilated. Ref: Ref: AK Khurana 4thE pg:292