Table 1.

Intraclass correlation between right and left eyes for various parameters.

Parameter	Intraclass correlation coefficient	Confidence interval	p-value
Autorefraction spherical equivalent	0.934	0.871–0.966	p < 0.001
Autorefraction total astigmatism	0.921	0.845–9.960	p < 0.001
Retinoscopy spherical equivalent	0.929	0.861–0.964	p < 0.001
Retinoscopy total astigmatism	0.962	0.926–0.984	p < 0.001
Subjective refraction spherical equivalent	0.968	0.937–0.977	p < 0.001
Subjective refraction total astigmatism	0.952	0.913–0.977	p < 0.001
Total astigmatism by Javal's rule	0.783	0.562–0.892	p < 0.001
Total astigmatism by Grosvenor's version of Javal's rule	0.783	0.562–0.892	p < 0.001