<prompt> Ocular manifestation in giant cell arteritis?Arteritic AIONNonarteritic AIONPapilledemaHorners Syndrome  <response>: Ans. a. Arteritic AIONAION occurs due to interference of blood supply to anterior part of optic nerve posterior ciliary arteryAION can be clinically differentiated into:Arteritic AIONNonarteritic AION. Due to giant cell arteritis. Due to occlusion of short posterior ciliary artery. Sudden, severe visual loss 660. Sudden, moderate visual loss 6060 non-progressive. Most common in females, 7-8th decade. Most common males, 5th-6th decade. Premonitory symptoms like pain, Amaurosis Fugax present. Premonitory symptoms like pain, Amaurosis Fugax absent. Usually Bilateral-fellow eye affected within days to weeks. Usually Unilateral 70. Pale optic disc. Hyperemic optic with small cup. Poor prognosis. Good prognosis 