Table 2. LogMAR visual acuity before and after operation.

Parameters	Group A (n=30)	Group B (n=30)	P
Preoperation	0.86±0.35	0.94±0.44	0.45
1d postoperation	0.14±0.19	0.10±0.10	0.27
1wk postoperation	0.07±0.07	0.04±0.06	0.12
4wk postoperation	0.05±0.05	0.04±0.05	0.37
6wk postoperation	0.04±0.05	0.03±0.05	0.49

x±s