The Ophthalmology Unit,  Universiti Malaysia Sarawak (UNIMAS), Kuching, Sarawak.

The Ophthalmology Department, Sarawak General Hospital, Kuching, Sarawak, East Malaysia.

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Convergent squint

Photo by Professor Chua Chung Nen

This 30 year-old woman has had a large right esotropia since childhood. Her vision measures 6/12 in the right eye and 6/6 in the left eye. Refraction shows no significant ammetropia. Fundoscopy is normal in both eyes.

 

Right esotropia in the primary position (top right); the right eye takes up fixation when the left eye is covered. She is able to move her right eye laterally and therefore excludes sixth nerve palsy as a cause. Right abduction (bottom left) is better than dextroversion (bottom right) because of the Hering's Law of equal innervation.

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