You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Conjunctival xerosis is seen in all of the following except: March 2008 and explain in detail?
Ans. D: Sarcoidosis Xerosis/xerophthalmia is a dry, lustreless condition of the conjunctiva due to a deficiency of mucin. It can be seen in: Local ocular disorders like trachoma, burns, pemphigoid, diphtheria, prolonged exposure due ectropion and proptosis etc. Systemic diseases like deficiency of vitamin A. Patients affected with sarcoidosis not infrequently show lesions in the conjunctiva. These lesions are typically nodular, translucent and orange in appearance. Keratoconjunctivitis sicca is a condition caused by deficiency of the aqueous component of the tears, i.e. the lacrimal secretion. Deficiency of conjunctival mucus occurs in stevens-Johnson syndrome.