Cycloplegic Effects on the Cylindrical Components of the Refraction

Table 1

Comparison of mean differences of sphere, power, axis, M, J0, and J45 before and after cycloplegia in different cylindrical power groups.

	Lower astigmatic power	Higher astigmatic power	value
Sphere	0.22 ± 0.46	0.33 ± 0.70	0.035
	Cylinder	0.03 ± 0.25		0.07 ± 0.46	0.209
Axis		3.51 ± 4.23	2.11 ± 2.86	<0.0001
	Range (0–30)	Range (0–20)
M	0.24 ± 0.47	0.37 ± 0.73	0.016
	J0	−0.002 ± 0.13		−0.03 ± 0.22	0.024
J45		0.003 ± 0.09	−0.03 ± 0.24	0.003

Lower astigmatic power = −2.25 to −0.50, higher astigmatic power = −2.50 to over.