This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sclera, Subject name: Ophthalmology
All are true about scleritis except? 
Select and explain. 
A. painless condition, B. glaucoma may occur, C. necrotising scleritis is more severe and destructive form, D. Anterior scleritis pain worsens at night
A: painless condition
Answer: A: painless condition 
Explanation: None