Ocular Surface Imaging Center, Cornea & Refractive Surgery Service, Massachusetts Eye & Ear Infirmary, and Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts 02114, USA.
Curr Opin Ophthalmol. 2012 Jan;23(1):47-53. doi: 10.1097/ICU.0b013e32834cd63e.
Obtaining precise postoperative target refraction is of utmost importance in today's modern cataract and refractive surgery. Given the growing number of patients undergoing premium intraocular lens (IOL) implantations, patient expectation continues to rise. In order to meet heightened patient expectations, it is crucial to pay utmost attention to patient selection, accurate keratometry and biometry readings, as well as to the application of correct IOL power formula with optimized lens constants. This article reviews recent advances in the field of clinical biometry and IOL power calculations.
Recently developed low-coherence reflectometry optical biometry is comparable to older ultrasonic biometric and keratometric techniques. In addition, the new IOLMaster software upgrade has improved reproducibility and enhanced signal acquisition. Further, the modern lens power formulas currently determine the effective lens position and the shape of the intraocular lens power prediction curve more accurately.
In order to reach target refraction, precise biometric measurements are imperative. Understanding the strengths and limitations of the currently available biometry devices allows prevention of high variability and inaccuracy, ultimately determining the refractive outcomes.
在当今的白内障和屈光手术中，获得精确的术后目标屈光度至关重要。鉴于越来越多的患者接受高端人工晶状体（IOL）植入，患者的期望持续上升。为了满足患者的高期望，必须非常注意患者的选择、准确的角膜曲率计和生物测量读数，以及正确的 IOL 屈光力公式与优化的镜片常数的应用。本文综述了临床生物测量和 IOL 屈光力计算领域的最新进展。
最近开发的低相干反射计光学生物测量与较旧的超声生物测量和角膜曲率计技术相当。此外，新的 IOLMaster 软件升级提高了可重复性和增强了信号采集。此外，现代镜片屈光力公式目前更准确地确定有效晶状体位置和晶状体屈光力预测曲线的形状。
为了达到目标屈光度，精确的生物测量是必要的。了解当前可用的生物测量设备的优缺点，可以防止高度的可变性和不准确性，最终决定屈光结果。
