方法：前瞻性研究。研究包含37例37眼白内障患者接受白内障超声乳化联合人工晶状体植入术。同一测量人员分别使用新型光学生物测量仪(Aladdin)与标准超声波测量仪(Sonomed AB 5500)对白内障患者进行检测。通过这两种设备记录生物测定参数，包括眼轴长度、角膜曲率、前房深度及人工晶状体屈光度数。分析术后实际屈光不正与两台设备根据SRK/T公式计算的误差，比较两台设备检查结果的平均估计误差(EE)、平均绝对估计误差(AEE)及生物测定参数。

结果：Aladdin测量仪(23.45±0.73 mm)较超声波测量仪(23.2±0.75 mm)检测出的眼轴显著较长(P=0.01)。Aladdin测量仪的EE与AEE均明显小于超声波测量仪(P=0.0006与0.03)。应用Aladdin测量的大多数眼与目标屈光度相差在±0.5(67%)及±1.00(97%)以内。

结论：Aladdin光学生物测量仪较超声波测量仪更精确，屈光结果更准确。

METHODS:Thirty-seven eyes of 37 cataract patients who underwent phacoemulsification with IOL implantation were included in this prospective comparative study. The same operator performed biometer measurements in eyes with cataract using a new optical biometer(Aladdin)and a standard ultrasonic biometer(Sonomed AB 5500). Biometric parameters; axial length(AL), keratometric(K)readings, anterior chamber depth(ACD)and IOL power obtained by two devices were recorded. Postoperative actual refractive errors and errors predicted by two devices according to SRK/T formula were analyzed. The mean estimation error(EE), mean absolute estimation error(AEE)and the biometric parameters obtained by two biometers were compared.

RESULTS:The AL measured by Aladdin(23.45±0.73 mm)was significantly longer than AL by ultrasonic biometer(23.2±0.75 mm)(P=0.01). The mean EE and AEE values obtained by Aladdin were significantly smaller than the values by ultrasonic biometer(P=0.0006 and 0.03 respectively). The higher percentage of eyes within ±0.5 and ±1.00 D of target refraction was also found by using Aladdin(67% and 97%).

CONCLUSION:The Aladdin optical biometer showed better accuracy and yielded better refractive outcomes compared with ultrasonic biometer.