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June 1969


Author Affiliations

Zurich, Switzerland
From the Department of Ophthalmology, Zurich University, Switzerland.

Arch Ophthalmol. 1969;81(6):758-762. doi:10.1001/archopht.1969.00990010760002

Primary microtropia is a clinical entity defined by anomalous retinal correspondence of less than 5°. Heredity plays a role. Fixation may be central or eccentric. Anisometropia or heterophoria are additional, but not essential, findings. Microtropia helps achieve a better understanding of amblyopia and of pathogenesis of strabismus. However insignificant microtropia is from the cosmetic point of view, it may be important to factors in strabismus.