Table 5.

Visual Acuity in the Amblyopic Eye at Baseline and at the 5-Week Masked Outcome Examination for the Secondary Cohort^*

	Patching N=33	Control N=29
Distribution of Visual Acuity in the Amblyopic Eye at Baseline n(%)
20/63	0	1 (3)
20/50	2 (6)	5 (17)
20/40	9 (27)	2 (7)
20/32	16 (48)	19 (66)
20/25	6 (18)	2 (7)
Distribution of Visual Acuity in the Amblyopic Eye at Masked Exam n(%)
20/80	0	1 (3)
20/63	0	2 (7)
20/50	0	1 (3)
20/40	7 (21)	8 (28)
20/32	8 (24)	11 (38)
20/25	12 (36)	5 (17)
20/20	5 (15)	1 (3)
20/16	1 (3)	0
Lines Change in Visual Acuity from Baseline to Masked Exam† mean (SD‡) in lines	0.8 (1.0)	0.0 (1.2)
Interocular Difference at Masked Exam (lines) n(%)
≥3	3 (9)	12 (41)
2	9 (27)	12 (41)
1	14 (42)	5 (17)
≤0 (amblyopic eye same or better than sound eye)	7 (21)	0

^*Secondary cohort included those patients with 2 lines of interocular difference or visual acuity of 20/32 in the amblyopic eye and 20/16 in the sound eye at baseline

^†P value = 0.003 adjusted for baseline visual acuity in analysis-of-covariance model.

^‡SD = Standard Deviation

1 patient in the patching group did not complete the 5-week exam