alternating hypertropia

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hypertropia, alternating

A condition in which, on dissociation (e.g. by occlusion) of either eye, the eye behind the cover deviates upward but reverts to its fixating position when dissociation ceases. The condition can either occur as an isolated phenomenon or be associated with strabismus or latent strabismus. Syn. anaphoria; anatropia; dissociated vertical divergence; double hyperphoria. See Bielschowsky's phenomenon.
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