方法：随机抽取2014-01/2015-09我院行白内障超声乳化手术的患者108例144眼，分成两组：A组行透明角膜切口(52例74眼)； B组行巩膜隧道切口(56例70眼)。两组患者保持相同的切口宽度。观察手术前1d，手术后1d，1、3wk，1、3mo眼部情况，记录患者干眼症状和泪膜破裂时间(break-up time，BUT)。

结果：白内障患者在进行超声乳化手术后1d、1wk，A组干眼症状评分要小于B组，差异有显著统计学意义(t=-6.199、-2.871，P<0.01)，而在术后其它时间则无统计学差异(t=-1.639、-0.829、-0.301，P>0.05)； 术后1d、术后1wk、术后3wk B组的BUT较A组长，对比有统计学差异(t=-3.718、-2.342、-2.506，P<0.05)，术后其他时间则无统计学差异(t=-0.882、1.225，P>0.05)。

结论：白内障超声乳化手术的两种不同切口对泪膜稳定性的影响仅在术后短期内存在差异； 而术后1mo后无明显差异。另外行透明角膜切口对泪膜稳定性的影响要大于行巩膜隧道切口，但干眼症状评分要明显小于行巩膜隧道切口。

METHODS: From January 2014 to September 2015, 108 patients(144 eyes)who underwent cataract surgery were divided into two groups: group A with clear corneal incision(52 cases with 74 eyes), group B with scleral tunnel incision(56 cases with 70 eye). Two groups of patients were taken the same incision width. Symptoms of dry eye and tear film break-up time(BUT)were observed 1d before and 1d, 1, 3wk, 1 and 3mo postoperatively.

RESULTS: After performing cataract phacoemulsification 1d, 1wk, symptoms score of dry eye of group A was less than that of group B, the difference was statistically significant(t=-6.199, -2.871, P<0.01), while at other times after operation there were no significant differences(t=-1.639, -0.829, -0.301, P>0.05); at postoperative 1d, 1 and 3wk, BUT of group B was better than those of group A, there were a statistically significant differences(t=-3.718, -2.342, -2.506, P<0.05), there were no significant differences at other the time after operation(t=-0.882,1.225, P>0.05).

CONCLUSION: The difference on effect of two different incision on the tear film stability only last a short time, which disappeared at 1mo after operation. The clear corneal incision has stronger impacts on tear film stability than scleral tunnel incision, while with a lower score on symptoms of dry eye.