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BINOCULAR VISION AFTER LENS IMPLANTATION
Author(s) -
SCARPATETTI A.
Publication year - 1983
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1983.tb01466.x
Subject(s) - dioptre , medicine , orthoptic , binocular vision , optometry , stereoscopic acuity , ophthalmology , heterophoria , test (biology) , visual acuity , surgery , strabismus , optics , physics , paleontology , biology
Orthoptic tests for binocular vision were performed on 107 patients with intraocular lenses 3 to 10 months after surgery. The tests carried out were: cover test, Worth‐test, Lang's two‐pencil‐test, the TNO‐test and Lang's stereo‐test. The implanted lenses were of the four‐loop Binkhorst type. They were all implanted after planned extracapsular surgery. Visual acuity 3 to 10 months after operation was 0.5 or more in 95% of the patients (0.8 or more in 53% of the patients). Refraction in spheric equivalents was ‐0.7 ± 1.26 diopters. The calculated optical aniseikonia was 2.2% ± 1.8%. Orthotropia as disclosed by the unilateral cover‐test prevailed in 81% of the patients. Most of the patients were exotrop (14 patients for the near, 6 patients for the near and the far). The results of Lang's two‐pencil‐test were positive in 89%. The Worth‐test (polarized, for distance) showed suppression in 23% of the patients. The random‐dot‐test (TNO‐test) showed positive results in 68% (retinal disparities 1980 arc seconds or less), in 57% (480 arc seconds or less), and the new Lang stereotest in 58% (1200 arc seconds or less) of the patients.