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 Neuroparalytic keratitis is due to which cranial nerve? and explain in detail?
5th nerve REF: Khurana 4th ed p. 107 "Neuroparalytic keratitis is due to paralysis of sensory supply to cornea which is by trigeminal nerve')