白内障超声乳化术后早期视力变化与前房深度的相关性研究

The correlation between variation of visual acuity and the anterior chamber depth in the early period after phacoemulsification

目的研究白内障术后早期视力变化与前房深度的相关性。方法对年龄相关性白内障患者32例36眼,行3.2mm透明角膜切口白内障超声乳化吸除术联合折叠型人工晶状体植入术。分别于术前,术后1、3、7、15d检查视力,IOL-master仪测量水平角膜曲率(K1)、垂直角膜曲率(K2)、角膜散光和前房深度。比较各项观察指标的变化,分析角膜散光,前房深度与术后视力的相关性。结果术前,术后1、3、7、15d角膜散光分别为-0.87±0.40,-1.92±1.38,-1.69±1.13,-1.45±0.79,-1.36±0.74D;前房深度分别为3.08±0.35,4.04±0.38,4.28±0.29,4.22±0.17,4.22±0.16mm;视力分别为0.18±0.10,0.44±0.14,0.59±0.12,0.61±0.11,0.62±0.14。术前与术后比较,角膜散光、前房深度及视力均有统计学差异(P<0.05);术后1d与15d角膜散光有统计学差异(P<0.05);术后1d与3d比较,前房深度和视力均有统计学差异(P<0.05)。术后1d,视力与角膜散光呈正相关(r=0.42,P<0.05);术后3d,视力与角膜散光呈正相关(r=0.35,P<0.05),与前房深度呈负相关(r=-0.29,P<0.05);术后7d,视力与角膜散光呈正相关(r=0.35,P<0.05),与前房深度呈负相关(r=-0.43,P<0.01);术后15d,视力与前房深度呈负相关(r=-0.37,P<0.05)。结论白内障超声乳化吸除术后早期视力变化不仅与角膜散光有关,而且与前房深度有关。

Objective To investigate the correlation between the visual acuity variation and the anterior chamber depth in the early period after phacoemulsification.Methods Thirty-six eyes of 32 patients with age-related cataract underwent 3.2mm clear corneal incision phacoemulsification and intraocular lens（IOL） implantation.The visual acuity was examined and horizontal curvature（K1）,vertical curvature（K2）,corneal astigmatism,and anterior chamber depth were measured with IOL-master preoperatively and also on 1,3,7 and 15 postoperative days.The changes in parameters were compared,and the correlations among visual acuity,corneal astigmatism and anterior chamber depth were analyzed.Results Before operation and 1d,3d,7d and 15d after operation,the corneal astigmatism was-0.87±0.40D,-1.92±1.38D,-1.69±1.13D,-1.45±0.79D and-1.36±0.74D;the anterior chamber depth was 3.08±0.35mm,4.04±0.38mm,4.28±0.29mm,4.22±0.17mm and 4.22±0.16mm;the visual acuity was 0.18±0.10,0.44±0.14,0.59±0.12,0.61±0.11 and 0.62±0.14.Significant difference was found between pre-operative and postoperative visual acuity,corneal astigmatism and anterior chamber depth,and it was also found in corneal astigmatism between 1d and 15d post operation（P〈0.05）,as well as in anterior chamber depth and visual acuity between 1d and 3d post operation（P〈0.05）.A positive correlation was found between visual acuity and corneal astigmatism on 1d（r=0.42,P〈0.05）,3d（r=0.35,P〈0.05） and 7d（r=0.35,P〈0.05） post operation;and a negative correlation was found between visual acuity and anterior chamber depth on 3d（r=-0.29,P〈0.05）,7d（r=-0.43,P〈0.01） and 15d（r=-0.37,P〈0.05） post operation.Conclusion Both the corneal astigmatism and the anterior chamber depth are correlated with the visual acuity variation in the early period after phacoemulsification.