Fluctuating oculomotor hyperfunction and hypofunction caused by aneurysmal compression of the third cranial nerve

Abstract
A 73 year old woman with a history of hypertension and ischaemic heart disease was referred to the eye department with a 3 week history of intermittent diplopia which she described as inconsistently horizontal, vertical, or oblique, and a 2 week history of right retro-orbital pain and difficulty in opening her right eye. The diplopia and ptosis were often worse in the mornings.