Abstract
Temporal arteritis and ophthalmic arteritis occurring in a pair of monozygotic twins, who were 72 and 77 yr of age, respectively, at the onset of symptoms, is reported. It is rare to see an improvement in an already existing severely reduced vision, in relation to corticosteroid treatment. The importance of genetic factors in temporal arteritis is discussed; it is suggested that a possible association of the disease with tissue type antigens be the object of further study.