This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
All are features of early retinal detachment except – 
Select and explain. 
A. Retro–orbital pain, B. Photopsia, C. Floaters, D. Darkened peripheral field of vision
A: Retro–orbital pain
Answer: A: Retro–orbital pain 
Explanation: Retinal detachment is a painless condition (no retroorbital pain) → Painless sudden loss of vision.
Other three symptoms occur in retinal detachment.