. Author manuscript; available in PMC: 2014 Dec 2.

Published in final edited form as: Ophthalmology. 2009 Jul 9;116(10):1839–1845. doi: 10.1016/j.ophtha.2009.04.004

Table 3.

Habitual Visual Acuity and Refractive Errors Measured by Cycloplegic Autorefraction (n = 428)

Spectacle Group	Uncorrected Habitual Vision in the Better Eye,^* mean ± SD (range)		Spherical Refractive Error^†		Astigmatism		Anisometropia
			Average of Both Eyes	Better Eye	≥0.75 DC in Both Eyes, n (%)	≥0.75 DC in Either Eye, n (%)	1–2 D Difference, n (%)

	logMAR	Snellen	D, mean ± SD (range)
Ready made	0.51±0.15 (0.3–1.0)	20/63⁻¹±8 letters (20/40–20/200)	−2.55±1.24 (−7.38 to −1.00)	−2.40±1.22 (−7.25 to −0.88)	33 (15)	81 (38)	11 (5)
Custom	0.50±0.15 (0.3–0.9)	20/63⁺¹±8 letters (20/40–20/160)	−2.62±1.34 (−8.75 to +2.88)	−2.44±1.36	33 (16)	74 (35)	11 (5)
P value		0.47	0.77	0.86	1.00	0.62	1.00

DC = diopters cylinder; logMAR = logarithm of the minimum angle of resolution; SD = standard deviation.

Before dilation.

^†

The spherical equivalent refractive error is an estimate of the best vision sphere (sphere + half of the cylindrical correction).