<prompt> Regarding CRAo which is true?Atherosclerosis in carotid aeries emboli originating in hea are 2 most common causeRelative afferent pupillary defect is absentLocal intraaerial thrombolysis has proven benefitMajority of patient will recover to gain good visual acuity  <response>: A;Atherosclerosis in carotid aeries emboli originating in hea are 2 most common cause 