Unilateral syphilitic perioptic neuritis in a patient coinfected with human immunodeficiency virus type 1

Perioptic neuritis caused by secondary syphilis is a rare ophthalmic manifestation in the HIV-infected host. Early diagnosis and treatment of this condition is required to prevent further visual damage. We report a case of unilateral syphilitic perioptic neuritis in a patient coinfected with HIV-1.