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
Welder's flash is due to - 
Select and explain. 
A. Infrared rays, B. UV rays, C. Blue - violet light, D. All of the above
B: UV rays
Answer: B: UV rays 
Explanation: Answer- B. UV raysWelder's flash is photophthalmia or photokeratitis.