| correspondence | Communication between persons or between institutions or organizations by an exchange of letters. Its use in indexing and cataloging will generally figure in historical and biographical material. (12 Dec 1998) |
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| abnormal correspondence | Abnormal correspondence, a condition, frequent in strabismus, in which corresponding retinal points do not have the same visual direction; the fovea of one eye corresponds to an extrafoveal area of the fellow eye. Synonym: abnormal correspondence. (05 Mar 2000) |
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| anomalous correspondence | Abnormal correspondence, a condition, frequent in strabismus, in which corresponding retinal points do not have the same visual direction; the fovea of one eye corresponds to an extrafoveal area of the fellow eye. Synonym: abnormal correspondence. (05 Mar 2000) |
| harmonious correspondence | A type of anomalous retinal correspondence in which the angle of the visual direction of the two retinas is equal to the objective angle of strabismus. (05 Mar 2000) |
| dysharmonious correspondence | A type of anomalous retinal correspondence in which the angle of the visual direction of the two retinas is different than the objective angle of the strabismus. (05 Mar 2000) |