Ultrasonic Determination of Axial Length in Pseudophakia.

Lee, Seong Bok; Choi, Si Hwan

Original Article

Journal of the Korean Ophthalmological Society 2000;41(5):1164-1169.
Published online May 1, 2000.

Ultrasonic Determination of Axial Length in Pseudophakia.

Seong Bok Lee, Si Hwan Choi

Department of Ophthalmology, College of Medicine, Chungnam National University, Korea.

인공수정체안의 안축장 측정

이성복(Seong Bok Lee),최시환(Si Hwan Choi)

Abstract

To investigate the accuracy of ultrasonic measurement of axial length in pseudophakia, we measured axial length by ultrasonic scan at pre-and post-operatively.One hundred nine eyes of 97 patients were divided according to the type of intraocular lens.We compared pre-and post-operative axial lengths with Ocuscan[Alcon, U.S.A.]. The postoperative axial lengths were measured in phakic, aphakic, and pseudophakic mode.In pseudophakic mode, the velocity in IOL was set at the rate of 980, 2200 and 2718m/sec for silicone, acrylic, and PMMA lens respectively. The postoperative axial lengths in pseudophakic mode were closest to the preoperative values in all groups. In conclusion, we can get the closest values to preoperative axial lengths by setting the velocity in pseudophakic mode at the rate of 980, 2200 and 2718m/sec for silicone, acrylic and PMMA lens, respectively.

Key Words: Axial length, Calculation;Intraocular lens;Pseudophakia