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New fixation device for photorefractive surgery and its effect on corneal epithelial wound healing

Authors
 Kim, Eung K  ;  Lee, Dong H  ;  Park, Jung W  ;  Chu, Young K  ;  Seo, Kyoung Y 
Citation
 Journal of Refractive Surgery, Vol.15(5) : 594-601, 1999 
Journal Title
JOURNAL OF REFRACTIVE SURGERY
ISSN
 1081-597X 
Issue Date
1999
MeSH
Adult ; Animals ; Corneal Topography ; Epithelium, Corneal/pathology* ; Epithelium, Corneal/surgery ; Equipment Design ; Eye Movements ; Female ; Humans ; Lasers, Excimer ; Male ; Middle Aged ; Myopia/pathology* ; Myopia/surgery ; Photorefractive Keratectomy/instrumentation* ; Rabbits ; Retrospective Studies ; Treatment Outcome ; Wound Healing*
Abstract
PURPOSE: A new eyeball fixation device during photorefractive surgery was designed and tested. The device fixates the eyeball by means of a suction ring, and is then fixated to the headrest of the patient's chair via clipper and metal frames. METHODS: Photorefractive keratectomy (PRK) was performed on PMMA contact lenses placed over the patient's cornea (n=6) to evaluate smoothness of the ablated surface and on rabbit (n=24) and patient (n=30) corneas for evaluation of wound healing time. Decentration with fixation was examined using videokeratography after PRK. RESULTS: After fixation, only small amounts of corneal movement from the patient's pulsating heart were noted. The mean smoothness (root mean square) of the PMMA contact lens ablated surface was 0.43 +/- 0.16 microm in non-fixated eyes and 0.26 +/-0.05 microm in fixated eyes. Mean epithelial healing rate was 47.93 +/- 21.80 microm/hr in non-fixated rabbit eyes and 66.49 +/- 20 microm/hr in fixated rabbit eyes. Mean epithelial healing time was 3.47 +/- 1.11 days in non-fixated human eyes and 2.53 +/- 0.51 days in fixated human eyes. Mean decentration after PRK was 0.30 +/- 0.28 mm in fixated human eyes. CONCLUSION: Fixating the eyeball allows less movement of the eye and achieves a smoother ablation surface for more rapid epithelial healing after PRK.
Full Text
https://search.proquest.com/docview/867025134?accountid=15179
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eung Kweon(김응권) ORCID logo https://orcid.org/0000-0002-1453-8042
Seo, Kyoung Yul(서경률) ORCID logo https://orcid.org/0000-0002-9855-1980
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/173977
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