Diplopia

Diplopia is a very bothersome symptom, which very often leads to early medical attention. However, some patients modify their lifestyle, wear dark glasses, prisms, or eye patches, and seek medical advice only if these measures fail. A careful knowledge and examination of the extraocular muscles and their nerves from the orbit to the brain stem is crucial to obtain the right diagnosis. Myasthenia gravis (MG) can mimic any single or combined oculomotor nerves palsy and should always be considered in the differential diagnosis of diplopia. The presence of sensory symptoms or severe retrooribital pain should prompt looking for a different cause than MG.