Table 1.

Distribution of UCVA and IOD in the reference population

	n (%)
LogMAR UCVA (Snellen equivalent)
0.6 (20/80)	1 (0.1)
0.5 (20/63)	2 (0.3)
0.4 (20/50)	6 (0.8)
0.3 (20/40)	106 (13.4)*
0.2 (20/32)	478 (60.4)*
0.1 (20/25)	170 (21.5)*
0 (20/20)	27 (3.4)
−0.1 (20/16)	1 (0.1)
UCVA IOD, lines (LogMAR equivalent)
0 (0.0)	595 (75.2)
1 (0.1)	181 (22.9)
2 (0.2)	14 (1.8)
3 (0.3)	1 (0.1)

*The 5th, 50th and 95th percentiles fell in the UCVA categories of 20/40, 20/32 and 20/25, respectively.

IOD, interocular difference; UCVA, uncorrected visual acuity.