<prompt> A most common cause of anterior uveitis associated with arthritisAnkylosing spondylitisRheumatoid arthritisSyphilisTuberculosis  <response>: Anterior uveitis is most commonly idiopathic or autoimmune and the most common cause is age-dependent:-Child JRA is the most common causeYoung adult s HLB-27 associated uveitis Ankylosing spondylitis is the most common causeOlder adults Idiopathic anterior uveitis is most common.Overall most common cause Idiopathic. 