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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Ophthalmology. 2008 Oct 29;116(1):145–153. doi: 10.1016/j.ophtha.2008.08.031

Table 2.

Fixation Preference Grade Compared to Interocular Difference (IOD) in Visual Acuity in Amblyopic Children 30–72 Months of Age

Fixation Preference Grade Lines Total
2 3 ≥ 4
Interocular Difference in Visual Acuity, n
A 20 6 7 33 (61%)
B 3 1 0 4 (7%)
C 3 1 1 5 (9%)
D 4 3 5 12 (22%)
Total 30 11 13 54

Amblyopia defined as ≥2-line IOD in best-measured visual acuity, with ≤20/32 worse in the worse eye. Forty children had isolated anisometropia, 10 had isolated strabismus, 3 had both strabismus and anisometropia, and 1 had anisometropia with a corneal scar.