Table 1.

The demographic data of the study subjects including number of eyes, age, sphere, and cylinder.

	Total	Simple Myopia	Compound Myopic Astigmatism	P-value
Number of eyes	1370	648	722	–
Age (year)	29.01 ± 5.19	28.85 ± 5.05	29.10 ± 5.31	0.43
Spherical Equivalent (D)	-3.64 ± 1.59	-3.31 ± 1.37	-4.07 ± 1.64	P < 0.0001
Cylinder (D)	-1.01 ± 0.95	-0.32 ± 0.18	-1.49 ± 0.84	P < 0.0001
J0	0.26 ± 0.50	.03 ± 0.14	0.50 ± 0.60	P < 0.0001
J45	0.04 ± 0.30	0.01 ± 0.11	0.07 ± 0.40	0.009