<prompt> Ocular effects that include mydriasis and fixed far vision are characteristic ofmecamylamineneostigminephentolaminephenylephrine  <response>: Mydriasis and fixed far vision can be due to either muscarinic receptor antagonists or ganglionic blockade. Because no M blockers are listed, the correct answer is mecamylamine. Alpha agonists phenylephrine have no effects on the focus of the eye. The cholinesterase inhibitor neostigmine and alpha blocker phentolamine cause miosis. Ocular effects of the beta blocker timolol are restricted to decreased formation of aqueous humor by the ciliary epithelium. 