[Headaches and the eye].

Headaches are common and are a frequent reason to seek medical attention. The general practitioner is often confronted with this problem and has to decide which investigations are to be ordered. Simple but careful history and examination are mandatory as the presence of a red eye, exophthalmos, ophthalmoplegia, anisocoria, ptosis or visual loss can help the physician to decide whether an ocular, orbital or intracranial etiology is to be sought. This paper summarizes the most frequent causes of ocular and orbital pathologies which can be responsible for headaches and also provides a non-exhaustive overview of important intracranial and systemic pathologies causing headaches and ocular signs and/or symptoms.