Table 3. Corneal astigmatism before operation and residual astigmatism after operation (D).

Group	Corneal astigmatism Preoperative	Residual astigmatism
		3mo after operation	6mo after operation	1y after operation
Moderate astigmatism group	1.85±0.48	0.60±0.47	0.68±0.40	0.62±0.47
High astigmatism group	2.90±0.57	0.61±0.41	0.60±0.40	0.65±0.42
U	2024	869.00	878.00	932.50
P	<0.01	0.26	0.28	0.52