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

Eung K. Kim, Dong H. Lee, Jung W. Park, Young K. Chu, Kyoung Y. Seo

Research output: Contribution to journalArticle

3 Citations (Scopus)

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 μm in non-fixated eyes and 0.26 ± 0.05 μm in fixated eyes. Mean epithelial healing rate was 47.93 ± 21.80 μm/hr in non-fixated rabbit eyes and 66.49 ± 20 μm/hr in fixated rabbit eyes. Mean epithelial healing time was 3.47 ± 1.11 days in nonfixated 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.

Original languageEnglish
Pages (from-to)594-601
Number of pages8
JournalJournal of Refractive Surgery
Volume15
Issue number5
Publication statusPublished - 1999 Sep 1

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Wound Healing
Photorefractive Keratectomy
Equipment and Supplies
Contact Lenses
Polymethyl Methacrylate
Rabbits
Cornea
Corneal Topography
Suction
Eye Movements
Metals

All Science Journal Classification (ASJC) codes

  • Surgery
  • Ophthalmology

Cite this

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title = "New fixation device for photorefractive surgery and its effect on corneal epithelial 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 μm in non-fixated eyes and 0.26 ± 0.05 μm in fixated eyes. Mean epithelial healing rate was 47.93 ± 21.80 μm/hr in non-fixated rabbit eyes and 66.49 ± 20 μm/hr in fixated rabbit eyes. Mean epithelial healing time was 3.47 ± 1.11 days in nonfixated 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.",
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New fixation device for photorefractive surgery and its effect on corneal epithelial wound healing. / Kim, Eung K.; Lee, Dong H.; Park, Jung W.; Chu, Young K.; Seo, Kyoung Y.

In: Journal of Refractive Surgery, Vol. 15, No. 5, 01.09.1999, p. 594-601.

Research output: Contribution to journalArticle

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AU - Seo, Kyoung Y.

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AB - 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 μm in non-fixated eyes and 0.26 ± 0.05 μm in fixated eyes. Mean epithelial healing rate was 47.93 ± 21.80 μm/hr in non-fixated rabbit eyes and 66.49 ± 20 μm/hr in fixated rabbit eyes. Mean epithelial healing time was 3.47 ± 1.11 days in nonfixated 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.

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