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. Author manuscript; available in PMC: 2014 Feb 16.
Published in final edited form as: J AAPOS. 2013 Feb;17(1):38–42. doi: 10.1016/j.jaapos.2012.10.017

Table 1.

Target angles defined depending on patient’s strabismus typea

Esodeviations Exodeviations
Fusion potential No fusion potential Fusion potential No fusion potential
Distanceb 0 PD to 6 PD XT 2 PD to 8 PD ET 2 PD to 8 PD ET 4 PD to 14 PD ET
Nearc 0 PD to12 PD XT 4 PD XT to 8 PD ET 10 PD XT to 8 PD ET 4 PD XT to 14 PD ET

ET, esotropia; PD, prism diopters; XT, exotropia.

a

Rare exceptions to target angles were made for patients with internuclear ophthalmoplegia, convergence insufficiency, and third nerve palsies, where the target angle was a greater ET (n = 7), when a patient had an atypical ET or XT drift after previous surgery (n = 4), and when appearance of the strabismus overrode measurements in nonfusing patients (n = 2).

b

Distance target ranges were observed when Krimsky measurements were used to optimize appearance for patients with abnormal angle kappa or when visual acuity precluded prism testing.,.

c

The distance target range was prioritized; the near target range became important in cases where the near XT exceeded the target range.