Rose Loreto T, Moshegov Con N
Department of Ophthalmology, Concord Repatriation General Hospital, Sydney, New South Wales, Australia.
Clin Exp Ophthalmol. 2003 Apr;31(2):121-4. doi: 10.1046/j.1442-9071.2003.00617.x.
A comparison of axial length estimates using applanation A-scan ultrasound and the Zeiss IOLMaster was conducted. The accuracy in predicting postoperative refraction determined by each method was also compared.
A cross-sectional study was performed on 51 eyes in 46 patients presenting to clinical practice for cataract surgery assessment. Preoperative measurement of axial length was performed with applanation ultrasound and the IOLMaster. The IOLMaster measurements were used to determine the intraocular lens power based on the SRK/T formula. Postoperative refractive outcomes were obtained and spherical equivalent calculated and compared to the predicted refractive error with each biometric method.
On average the axial lengths measured by the IOLMaster were longer by 0.15 mm compared to ultrasound biometry (P < 0.01). Using the IOLMaster over applanation ultrasound biometry significantly improved the postoperative refractive outcome from 0.65 D to 0.42 D (P = 0.011).
The IOLMaster provides an accurate axial length measurement and results in accurate intraocular lens power calculation based on the SRK/T formula. It is quick and easy to use and provides a non-contact technique with no risk of infection or corneal abrasion.
对使用压平式A超超声和蔡司IOLMaster测量眼轴长度进行比较。同时比较两种方法预测术后屈光不正的准确性。
对46例因白内障手术评估前来临床就诊的患者的51只眼睛进行横断面研究。术前使用压平式超声和IOLMaster测量眼轴长度。IOLMaster测量结果用于根据SRK/T公式确定人工晶状体度数。获取术后屈光结果，计算球镜等效度，并与每种生物测量方法预测的屈光不正进行比较。
平均而言，IOLMaster测量的眼轴长度比超声生物测量法长0.15 mm（P < 0.01）。与压平式超声生物测量法相比，使用IOLMaster可使术后屈光结果从0.65 D显著改善至0.42 D（P = 0.011）。
IOLMaster可提供准确的眼轴长度测量结果，并能基于SRK/T公式准确计算人工晶状体度数。它使用快速简便，提供非接触技术，无感染或角膜擦伤风险。
