Intermittent Exotropia: What Constitutes a Cure?
John A. Pratt-Johnson, F.R.C.S.(C)
CRITERIA FOR CURE
In order to evaluate a patient who has had treatment for intermittent
exotropia,
corrective lenses are worn if the patient has a significant refractive error.
The
patient is cured if the following criteria are met:
1. There is no manifest tropia in any position of gaze or at any distance.
2. There is no winking or closing of one eye in sunshine or bright light.
3. There is stereopsis of 60 seconds of arc or better using the Titmus test at
near fixation.
4. There are convergent and divergent fusional amplitudes and diplopia when
these are exceeded.
5. There is a near point of convergence under 10 cm.
6. There is central fusion using central controls which subtend a visual angle
less than 5 degrees on slides in a haploscopic device such as a troposcope or a
synoptophore.
© 1992 The Board of Regents of the University of Wisconsin System
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