microstrabismus(mī″krō-stră-bĭs′mŭs) [″ + strabismos, a squinting]
Movement of the eyes in divergent directions or at different speeds. These movements are too small and too quick to be seen, but they have been detected through analysis of high-speed motion pictures.
A small-angled (usually less than 6-8 Χ in angle) inconspicuous strabismus which is not usually detected by cover test, either because the deviation is too small or because the angles of abnormal retinal correspondence and eccentric fixation coincide with the angle of deviation. There is usually amblyopia in the deviated eye and there may also be anisometropia. The patient with this condition displays nearly normal binocular vision without symptoms. Management usually consists of correcting the refractive error. Syn. microsquint; microstrabismus; small angle strabismus. See four prism dioptre base out test.