The Effects of a New Eyeball Fixation Device on the Ablation Surface Profile in Photore fractive Kertectomy.

Lee, Dong Ho; Kim, Eung Kweon; Seo, Kyoung Yul; Lee, Hyun Chae; Lee, Jae Bum; Kim, Jung Bum

Original Article

Journal of the Korean Ophthalmological Society 2001;42(1):127-136.
Published online January 1, 2001.

The Effects of a New Eyeball Fixation Device on the Ablation Surface Profile in Photore fractive Kertectomy.

Dong Ho Lee, Eung Kweon Kim, Kyoung Yul Seo, Hyun Chae Lee, Jae Bum Lee, Jung Bum Kim

Department of Ophthalmology, Ajou University School of Medicine, Korea.

엑시머레이저 굴절교정각막절제술에서 새로운 안구고정장치의 효과

이동호(Dong Ho Lee),김응권(Eung Kweon Kim),서경률(Kyoung Yul Seo),이현채(Hyun Chae Lee),이재범(Jae Bum Lee),김정범(Jung Bum Kim)

Abstract

The surgical outcome of excimer laser photorefractive keratectomy(PRK) depends on the accuracy of ablation and the smoothness of the surface ablated. The purpose of this study was to investigate the clinical usefulness of a new eyeball fixation device(EK fixation device). First, the PRK was done on the cornea of New Zealand white rabbit (-8 D, 5.5 mm). The surface with the device was smoother compared to that without. Second, The PRK (-4 D, 6 mm)was done on the surface of the contact lens over the cornea of human volunteers. The ablation surface with the device was smoother than that without(0.20+/-0.04 micrometer vs. 0.34 +/-0.14 micrometer, p=0.028). The epithelial healing experiment in New Zealand white rabbit after myopic PRK (-8 D, 5.5 mm)showed more rapid wound healing in the fixation group (66.49+/-0.03 micrometer/hr vs 47.93+/-1.80 micrometer/hr, p=0.0001). In conclusion, the EK fixation device during the PRK procedures creates a smoother ablation surface and enhances corneal epithelial healing, thus may be a useful clinical device.

Key Words: EK fixation device;Excimer laser photorefractive keratectomy;Smoother ablation surface