Vertical fusional amplitudes in patients wearing vertical anisometropic correction.
OBJECTIVE
To examine the relationship between vertical anisometropic spectacle correction and vertical fusional amplitudes in patients.


METHODS
Comparative observational case series.


METHODS
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.


METHODS
Vertical fusional amplitudes were recorded in all patients using a prism bar.


METHODS
Vertical fusional amplitudes and vertical anisometropia.


RESULTS
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).


CONCLUSIONS
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.
Griebel
S R
SR
Cleveland Clinic, Ohio, USA.
Riemann
C D
CD
Szymusiak
E L
EL
Kosmorsky
G S
GS
D015858:Anisometropia / Q000503:physiopathology / Q000628:therapy*; D005139:Eyeglasses; D006801:Humans; D015348:Vision, Binocular / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*