Comparison of Two Wavefront Autorefractors: Binocular Open-Field versus Monocular Closed-Field

Table 4

Intersession repeatability of vertical cylindrical vector (J0) obtained with both binocular open-field (eye refract) and monocular closed-field (VX110) autorefractors in terms of mean difference between sessions (bias), its standard deviation (SD), repeatability (S_r), and its 95% limit (r).

Wavefront autorefractor	Group	J0	Session 1-session 2	Session 1–session 3	Session 2-session 3	Repeatability [95% limit] (D)
Eye refract	Total	Bias ± SD (D)	−0.04 ± 0.19	−0.03 ± 0.12	0.02 ± 0.19	0.12 [0.34]
		value	0.077	0.059	1.000
	Teenagers	Bias ± SD (D)	−0.04 ± 0.10	−0.03 ± 0.10	0.01 ± 0.09	0.07 [0.20]
		value	0.276	0.767	1.000
	Adults	Bias ± SD (D)	−0.03 ± 0.09	−0.04 ± 0.09	−0.01 ± 0.10	0.06 [0.18]
		P-value	0.171	0.033	1.000
	Presbyopes	Bias ± SD (D)	−0.06 ± 0.27	−0.02 ± 0.14	0.04 ± 0.26	0.16 [0.46]
		value	0.478	1.000	0.982
VX110	Total	Bias ± SD (D)	0.02 ± 0.22	−0.01 ± 0.10	−0.04 ± 0.20	0.35 [0.98]
		value	0.909	0.355	0.196
	Teenagers	Bias ± SD (D)	−0.01 ± 0.09	−0.02 ± 0.08	−0.02 ± 0.08	0.26 [0.73]
		value	1.000	0.588	1.000
	Adults	Bias ± SD (D)	0.02 ± 0.15	0.00 ± 0.10	−0.02 ± 0.13	0.33 [0.92]
		value	1.000	1.000	1.000
	Presbyopes	Bias ± SD (D)	0.04 ± 0.29	−0.02 ± 0.10	−0.06 ± 0.27	0.40 [1.11]
		value	1.000	0.502	0.458