Table 5.

Comparison of Right Eye (RE) Spot and Plusoptix refractive error estimates to cycloplegic refraction measurements of astigmatism, spherical equivalent, and anisometropia for students on whom a screening estimate was obtained. T-tests and correlation analyses compared results for screening instruments to results for cycloplegic refraction.

Screener	Measurement		Mean	SD	t test P value	Correlation (r)	Correlation P value
Spot N=202	Astigmatism J0	Cyclo Ref	0.79	0.82	<0.001	0.92	<0.001
		Spot	0.90	0.80
		Difference	−0.12	0.33
	Astigmatism J45	Cyclo Ref	0.07	0.28	=0.097	0.61	<0.001
		Spot	0.11	0.45
		Difference	−0.04	0.35
	Astigmatism Clinical notation	Cyclo Ref	1.64	1.67	<0.001	0.93	<0.001
		Spot	1.98	1.65
		Difference	−0.34	0.60
	Spherical Equivalent	Cyclo Ref	+0.20	1.51	<0.001	0.85	<0.001
		Spot	−0.10	1.01
		Difference	0.30	0.84
	Anisometropia	Cyclo Ref	0.40	0.66	=0.053	0.83	<0.001
		Spot	0.35	0.59
		Difference	0.05	0.36
Plusoptix N=112	Astigmatism J0	Cyclo Ref	0.40	0.47	<0.001	0.94	<0.001
		Plusoptix	0.67	0.77
		Difference	−0.27	0.36
	Astigmatism J45	Cyclo Ref	0.02	0.17	=0.101	0.79	<0.001
		Plusoptix	0.05	0.30
		Difference	−0.03	0.20
	Astigmatism Clinical notation	Cyclo Ref	0.84	0.97	<0.001	0.94	<0.001
		Plusoptix	1.48	1.52
		Difference	−0.64	0.69
	Spherical Equivalent	Cyclo Ref	+0.09	0.87	<0.001	0.69	<0.001
		Plusoptix	+0.56	1.07
		Difference	−0.48	0.78
	Anisometropia	Cyclo Ref	0.25	0.20	<0.001	0.21	=0.027
		Plusoptix	0.43	0.41
		Difference	−0.17	0.41

Cyclo Ref = cycloplegic refraction