B型超声测量眼轴长度的价值

目的 探讨B型超声测量眼轴长度的价值。方法 选择白内障或并发视网膜病变病人70例140只眼。分别用A型及B型超声进行眼轴长度测量,按照眼轴的长度分为3组：A组〈24 mm,B组24～26 mm;C组〉26 mm。应用t检验比较两种仪器测量各组眼轴长度的均值。结果 A、B两组共100只眼,A、B型超声测量眼轴长度的差别无统计学意义（P〉0.05）。C组40只眼,A、B型超声测量眼轴长度的差别有统计学意义（t=2.11,P〈0.05）,与常规A型超声测量法相比,B型超声术后残余屈光在1 D以上的比例减少30%。结论 B型超声测量眼轴长度简便、准确,尤其是测量高度近视眼或玻璃体视网膜病变眼优于A型超声。

THE VALUE OF B-MODE ULTRASONOGRAPHY IN MEASURING AXIS OCULI

Objective To assess the value of B-mode uhrasonography for measuring the length of axis oculi. Methods This study consisted of 140 eyes （70 patients） with cataract or combined with retinopathy. According to the length of axis oculi, they were divided into three groups. Group A： length〈24 mm; group B2 24-26 mm; group C1〉26 mm. The length was measured by A-mode and B mode ultrasonography. The mean of the length was analyzed with t-test. Results Of 100 eyes in groups A and B, the differences of length measured by two instruments were not statistically significant （t=2.11 ,P〉0.05）. Of 40 eyes in group C, the differences of length were significant （t = 2.11, P〈0. 05）. Compared with routine A mode uhrasonography, the postoperative residual reflection reduced by 30%. Conclusion B-mode uhrasonography is accurate and easy to measure the length of axis oculi which is superior to A-mode one especially in the eye with high myopia and vitreoretinopathy.