Razmju Hasan, Rezaei Leila, Nasrollahi Kobra, Fesharaki Hamid, Attarzadeh Hossein, Footami Farhad Janbaz
Isfahan Eye Research Center, Feiz Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.
J Ophthalmic Vis Res. 2011 Jul;6(3):160-5.
To compare keratometric measurements using a Javal type manual keratometer with IOLMaster in eyes undergoing photorefractive keratectomy (PRK) for myopia.
In this comparative case series, we studied patients aged 21 to 27 years scheduled for myopic PRK. Keratometry was performed preoperatively and three months after the procedure using a Javal type manual keratometer and the IOLMaster. We compared postoperative measurements obtained by both instruments with the clinical history method (CHM).
Seventy eyes of 35 patients with mean age of 23.45±1.55 years were studied. Mean preoperative spherical equivalent was -4.53±1.3 D. Average preoperative IOLMaster and manual keratometric readings were 45.95±1.23 D and 46.32±1.18 D, respectively. Postoperatively, mean IOLMaster measurements was 38.03±0.68 D and that of manual keratometry was 43.15±1.1 D. Compared to CHM measurements, the 95% limits of agreement were -5.95 to -0.85 for the IOLMaster and -1.44 to 4.04 for manual keratometry.
Keratometric measurements with the IOLMaster and a Javal type manual device are comparable after PRK; both are largely deviant from the CHM and can yield misleading results.
比较在接受近视性准分子激光原位角膜磨镶术（PRK）的眼中，使用Javal型手动角膜曲率计与IOLMaster测量角膜曲率的情况。
在这个比较性病例系列中，我们研究了计划接受近视性PRK的21至27岁患者。术前及术后三个月使用Javal型手动角膜曲率计和IOLMaster进行角膜曲率测量。我们将两种仪器获得的术后测量结果与临床病史法（CHM）进行比较。
研究了35例患者的70只眼，平均年龄为23.45±1.55岁。术前平均等效球镜度为-4.53±1.3 D。术前IOLMaster和手动角膜曲率测量的平均读数分别为45.95±1.23 D和46.32±1.18 D。术后，IOLMaster测量的平均值为38.03±0.68 D，手动角膜曲率测量的平均值为43.15±1.1 D。与CHM测量结果相比，IOLMaster的95%一致性界限为-5.95至-0.85，手动角膜曲率测量为-1.44至4.04D。
PRK术后使用IOLMaster和Javal型手动设备测量角膜曲率具有可比性；两者与CHM相比都有较大偏差，可能产生误导性结果。
