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 Which one of the following is not a mydriatic? and explain in detail?
Pilocarpin is a miotic by acting on iris sphincter muscle. Pilocarpine is a parasympathomimetic drug. It is a non-selective muscarinic receptor agonist in the parasympathetic nervous system, which acts at the muscarinic acetyl choline receptor M3. It also acts on ciliary muscles to open up trabecular meshwork, hence increase the drainage of aqueous humor, thus decreasing the intraocular pressure. So it is useful in glaucoma also. Atropine, homatropine, tropicamide are mydriatics.