方法：选择2014-07/2015-03我院年龄相关性白内障患者362例362眼，随机分成2.2mm组(211例211眼)和2.8mm组(151例151眼)。术前记录裸眼视力、最佳矫正视力、屈光状态和角膜内皮计数结果。术中记录超声能量、超声乳化时间。术后记录裸眼视力、最佳矫正视力、屈光状态、角膜内皮计数。

结果：两组患者术后裸眼及最佳矫正视力与术前相比均有明显提高，术后1wk时2.2mm组裸眼视力较2.8mm组提高明显，具有统计学意义(P<0.05)。2.2mm组患者在术后1wk角膜散光小于2.8mm组，两组比较有统计学差异(P<0.05)。两组患者术后角膜内皮计数都有不同程度的下降，但两组间没有统计学差异(P>0.05)。两组患者术中使用的超声能量及超声乳化时间没有统计学差异(P>0.05)。

结论：2.2mm同轴微切口白内障超声乳化手术具有创伤小、恢复快、术后裸眼视力好、SIA小等优点，是一种值得推广的手术方式。

METHODS:The selected 362 patients(362 eyes)with age-related cataract were randomly divided into 2.2mm group(211 cases with 211 eyes)and 2.8mm group(151 cases with 151 eyes)in our hospital from July 2014 to March 2015.The uncorrected visual acuity(UCVA), the best corrected visual acuity(BCVA), refractive state and corneal endothelium counting were recorded preoperatively. The ultrasonic energy and ultrasonic emulsification time during operations were also recorded. The UCVA, BCVA, refractive state were recorded postoperatively at 1d, 1wk, 1mo and corneal endothelium counting was also recorded at 1wk and 1mo after operations.

RESULTS:The UCVA and BCVA were significantly improved compared with those preoperative in both groups. At 1wk postoperatively, the UCVA of 2.2mm group was significantly better compared with that of 2.8mm group(P<0.05). The corneal astigmatism in the 2.2mm group was less than that in the 2.8mm group at 1wk postoperatively(P<0.05). The corneal endothelium counting of the two groups decreased in different degrees postoperatively, but there was no significant difference between the two groups(P>0.05). There were no statistical difference between the two groups on the ultrasonic energy and the ultrasonic emulsification time either(P>0.05).

CONCLUSION:With less injury, quicker recovery, better postoperative UCVA, small incision, coaxial 2.2mm micro incision phacoemulsification is a operation worth promotion.