An ocular manifestation of a systemic disease or congenital condition may be its first visible presentation. The eye is the only organ in which vascular disease can be observed in vivo. This may enable a clinician to observe signs of systemic disease. Awareness of these associations assists early diagnosis and may help to reduce the risk of complications.
This is a companion discussion topic for the original article at https://patient.info/doctor/ophthalmology/eye-in-systemic-disease