Visual acuity for the advanced aged group at 1 day, one week and one month after operation was 0 5 or better in 30 eyes, 52 eyes and 74 eyes, respectively.

• 高龄老年组术后第 1天、1周和 1个月视力达到或超过 0 5者分别是 30只眼、5 2只眼、74只眼。