The Change of Axial Length after Laser in-Situ Keratomileusis.

Lee, Dam Ho; Sohn, Sae Woon; Kim, Joon Mo; Wie, Ho Young

Original Article

Journal of the Korean Ophthalmological Society 2003;44(8):1736-1740.
Published online August 1, 2003.

The Change of Axial Length after Laser in-Situ Keratomileusis.

Dam Ho Lee, Sae Woon Sohn, Joon Mo Kim, Ho Young Wie

¹Vision Eye Center, Korea. damholee@unitel.co.kr
²Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Korea.
³Department of Ophthalmology, National Medical Center, Korea.

라식수술 후 안축장의 변화

이담호 ( Lee Dam Ho ) , 손세운 ( Son Se Un ) , 김준모 ( Kim Jun Mo ) , 위호영 ( Wi Ho Yeong )

Abstract

PURPOSE
We prospectively conducted this study to evaluate the effect of laser in-situ keratomileusis (LASIK) on axial length because axial length is an important varible for IOL power calculation. METHODS: One hundred three eyes of fifty two myopic patients had measurements of axial length, ultrasonic central pachymetric readings and otherwise preoperatively and 3 months after LASIK. RESULTS: The axial length and central corneal thickness were reduced statistically significant 3 months after LASIK by 66+/-0.28 micrometer and 57+/-23 micrometer respectively (P<0.05). IOL power is about 15.8+/-3.25 diopter preoperatively and 15.9+/-3.21 diopter postoperatively. The mean difference is -0.13 diopter.(p value>0.05) CONCLUSIONS: But the reduction of axial length after LASIK is so small that very small influence is expected on IOL power calculation for the patient who had previous LASIK. So when preoperative IOL power calculation is done using historical method, post-LASIK axial length can be replaced for pre-LASIK axial length to calculate proper IOL power for cataract surgery.

Key Words: Axial length;IOL power calculation;Laser in-situ keratomileusis