高度轴性近视白内障伴后巩膜葡萄肿患者眼轴的测量

Axial length measurements in high axial myopia patients with cataract and posterior staphyloma

目的比较研究高度轴性近视白内障伴后巩膜葡萄肿患者的眼轴测量方式。方法纳入高度轴性近视白内障伴有黄斑区后巩膜葡萄肿的患者进行研究,共48例(72只眼),分别采用IOL-Master、注视下接触式A型超声和普通接触式A型超声测量其眼轴,并依据IOL-Master测量值将眼轴分为A段(26.0~28.0 mm)和B段(≥28 mm),比较各种方式测量下眼轴的差异。结果 A型超声测量眼轴长度较IOL-Master的测量值短,差异具有统计学意义(P<0.05或0.01)。在注视下接触式A型超声测量中,A段与IOL-Master测量的差值较B段眼轴段的测量差值小,差异具有统计学意义(P<0.01)。在普通接触式A型超声测量中,A段与IOL-Master测量的差值较B段的测量差值小(P<0.01)。结论 A型超声和IOL-Master在测量高度轴性近视白内障伴有黄斑区后巩膜葡萄肿患者的眼轴时,测量值存在差异,但是注视下接触式和普通接触式A型超声测量之间无明显差异。

Objective To compare the methods of axis length measurement in high axial myopia patients with cata- ract and posterior staphyloma. Methods 48 cases （72 eyes ） of high axial myopia patients with cataract and posterior staphyloma were included. Axial length was accessed by IOL-Master, gazing contact A-scan, and regular contact A-scan. Based on the results from IOL-Master, A segment （ 26.0 - 28.0 mm） and B segment （ 〉28 ram） were defined. The differences between 3 methods were analyzed. Results Axial length measured by A-scan was shorter than that by IOL- Master, and this difference was significant （ P 〈 0.01 ）. Difference in A-segment between gazing contact A-scan and IOL- Master was smaller than the difference in B segment （ P 〈 0. 01 ）. Similarly, difference in A-segment between regular con- tact A-scan and IOL-Master was smaller than the difference in B segment （ P 〈 O. 01 ）. Conclusions Measurements of axial length in high axial myopia patients with cataract and posterior staphyloma were significantly different between A-scan and IOL-Master. Gazing contact A-scan and regular contact A-scan were similar.