Table 4 Mean scores (95% CI) by visual acuity (better eye), binocular status, and by between eye differences in visual acuity

Visual acuity (better eye)

6/9 or better

877 (50)

79.7 (78.8, 80.5)

99.4 (99.2, 99.5)

94.7 (94.3, 95.1)

<6/9 to 6/12

387 (22)

75.0 (73.6, 76.4)

98.6 (98.1, 98.9)

92.8 (92.0, 93.4)

<6/12 to 6/18

277 (16)

72.1 (70.3, 73.8)

97.2 (96.1, 98.0)

91.2 (90.1, 92.2)

<6/18

203 (12)

60.4 (57.7, 63.0)

88.1 (82.5, 92.0)

83.1 (80.5, 85.3)

P-value †

1744

<0.001

<0.001

<0.001

Binocular status

Binocular

1561 (90)

76.7 (76.0, 77.3)

98.9 (98.7, 99.0)

93.6 (93.3, 93.9)

Monocular ‡

183 (10)

64.7 (62.0, 67.3)

94.7 (92.0, 96.5)

83.1 (80.4, 85.5)

P-value

1744

<0.001

<0.001

<0.001

Difference in acuity between eyes

Equal acuity

185 (12)

80.2 (78.4, 81.9)

99.4 (99.1, 99.6)

95.4 (94.6, 96.0)

≤ 0.1 LogMAR

657 (42)

77.9 (76.9, 78.9)

99.2 (99.0, 99.3)

94.5 (94.0, 94.9)

>0.1 LogMAR

719 (46)

75.4 (74.4, 76.4)

98.4 (98.1, 98.7)

92.6 (92.0, 93.1)

P-value †

<0.001

<0.001

<0.001