upward deviation of the visual axis of one eye when the other eye is fixing. adj., adj anatrop´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann