Vertical fusional amplitudes in patients wearing vertical anisometropic correction

• Published in: Ophthalmology (Rochester, Minn.) Vol. 106; no. 9; p. 1731
• Main Authors: Griebel, S R, Riemann, C D, Szymusiak, E L, Kosmorsky, G S
• Format: Journal Article
• Language: English
• Published: United States 01-09-1999
• Subjects: Anisometropia - physiopathology; Anisometropia - therapy; Eyeglasses; Humans; Vision, Binocular - physiology; Visual Acuity - physiology; Visual Perception - physiology
• ISSN: 0161-6420
• DOI: 10.1016/S0161-6420(99)90359-7

To examine the relationship between vertical anisometropic spectacle correction and vertical fusional amplitudes in patients.
Comparative observational case series.
Twenty-one patients exposed to greater than 0.5 diopters of vertical anisometropic spectacle correction were compared with 46 patients not exposed to anisometropic correction.
Vertical fusional amplitudes were recorded in all patients using a prism bar.
Vertical fusional amplitudes and vertical anisometropia.
In patients exposed to greater than 0.5 diopters of vertical anisometropic spectacle correction, vertical fusional amplitudes measured 5.2+/-1.4 prism diopters. Patients not exposed to anisometropic correction had vertical fusional amplitudes of 2.7+/-1.2 prism diopters (P < 0.0001).
Patients with vertical anisometropic correction have increased vertical fusional amplitudes. This finding is relevant when evaluating patients with ocular motility disorders, especially with regard to distinguishing acquired versus longstanding deviations.