This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
Most common type of scleritis among the following is 
Select and explain. 
A. Non-necrotizing, B. Necrotizing, C. Posterior, D. Granulomatous
A: Non-necrotizing
Answer: A: Non-necrotizing 
Explanation: Scleritis refers to a chronic inflammation of the sclera proper. It is a comparatively serious disease which may cause visual impairment and even loss of the eye if treated inadequately. It usually occurs in elderly patients (40-70 years) involving females more than the males. It can be classified as follows:I. Anterior scleritis (98%)1. Non-necrotizing scleritis (85%)(a) Diffuse(b) Nodular2. Necrotizing scleritis (13%)(a) with inflammation(b) without inflammation (scleromalacia perforans)II. Posterior scleritis (2%) REF:Comprehensive ophthalmology,AK Khurana,4th edition,pg no.129.