ABSTRACT
Diplopia or double vision can be either monocular due to intraocular pathology or binocular due to imbalance between the two eyes. Common causes of binocular diplopia in adults are due to cranial nerve abnormalities. This chapter details strabismus caused by individual muscle palsy and common systemic associations. The reader will learn how to examine a patient presenting with double vision, and how to identify sight or life threatening pathology. Investigations are detailed including what to do with a patient with a oculomotor palsy and how to differentiate a long standing squint from a pathological one.
