Department of Ophthalmology, Selcuklu Faculty of Medicine, Selcuk University, Konya, Turkey.
Cornea. 2013 Apr;32(4):e21-4. doi: 10.1097/ICO.0b013e31825fee82.
To evaluate the effect of pupil dilation on the biometric parameters of the Lenstar LS 900 (Haag Streit AG, Koeniz, Switzerland).
In this cross-sectional study of 33 eyes with cataracts, axial length (AL), anterior chamber depth, intraocular lens (IOL) power, keratometry, and pupil diameter measurements were performed using Lenstar biometry before and after pupil dilatation. Intraobserver repeatability was assessed by taking 2 consecutive recordings of biometric parameters using Lenstar biometry in the undilated pupils of 30 eyes with cataracts.
The mean difference in AL measurements from intraobserver readings was -0.001 ± 0.01 mm. The study group showed a statistically significant change in the first keratometry reading and anterior chamber depth values (P < 0.05); however, the mean difference in AL and IOL power was statistically insignificant between the undilated and dilated pupil Lenstar biometry readings. Three cases in the study group (9.1%) and 1 case in the control group (3.3%) demonstrated changes in IOL power >0.50 diopter.
Dilated and undilated pupil size did not affect the measurement of IOL using the Lenstar biometry.
评估瞳孔散大对 Lenstar LS 900（Haag Streit AG，瑞士 Koeniz）生物测量参数的影响。
在这项 33 只白内障眼的横断面研究中，使用 Lenstar 生物测量仪在瞳孔散大前后分别测量眼轴长度（AL）、前房深度、人工晶状体（IOL）度数、角膜曲率和瞳孔直径。通过对 30 只白内障眼未散瞳的瞳孔进行 2 次连续的 Lenstar 生物测量参数记录，评估观察者内重复性。
观察者内读数的 AL 测量值平均差异为-0.001±0.01mm。研究组的第一个角膜曲率读数和前房深度值有统计学意义的变化（P<0.05）；然而，未散瞳和散瞳 Lenstar 生物测量读数之间的 AL 和 IOL 度数的平均差异无统计学意义。研究组中有 3 例（9.1%）和对照组中有 1 例（3.3%）的 IOL 度数变化>0.50 屈光度。
瞳孔散大和不散大对使用 Lenstar 生物测量仪测量 IOL 没有影响。
