| The Effect of Holmium:YAG Laser Thermokeratoplasty on Corneal Astigmatism in Rabbits. |
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Dong Eul Shin, Key Hwan Lim, Woo Chul Choi, Woo Jung Kim, Won Ryang Wee, Jin Hak Lee, Bong Leen Chang |
1Department of Ophthalmology, Korea Veterans Hospital, Seoul, Korea.
2Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.
3Department of Ophthalmology, Samsung Medical Center, Seoul, Korea. |
| 토끼에서 Holmium : YAG 레이저 열각막성형술이 각막난시에 미치는 영향 |
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이진학(Jin Hak Lee),신동을(Dong Eul Shin),임기환(Key Hwan Lim),최우철(Woo Chul Choi),김우중(Woo Jung Kim),위원량(Won Ryang Wee),장봉린(Bong Leen Chang) |
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| Abstract |
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This animal study was conducted to investigate the effect of holmium:YAG laser thermokeratoplasty on correction of hyperopic astigmatism. A pulsed holmium:YAG laser emitting a wavelength of 2.06 micrometer was used. Arcuate, reverse arcuate, linear patterns of laser burn were applied along the flat corneal meridian and their effects on the rabbit corneal curvature were studied. Keratometric measurements and cycloplegic refractive error were determined preoperatively, one, two, and three months after operation. The changes of refractive astigmatism in three patterns of laser burn were 0.8130, 3.0243, 0.8437 diopter, respectively, compared to that of the control group on postoperative three months. The changes of keratometric astigmatism were 1.1719, 3.0737, 0.7812 diopter, respectively, compared to that of the control group on postoperative three months. We found that holmium:YAG laser thermokeratoplasty is effective in steepening flat corneal meridian, and the most effective pattern is reverse arcuate type. In future holmium:YAG laser thermokeratoplasty might be clinically applicable as a operation of hyperopic astigmatism correction. |
| Key Words:
Holmium:YAG laser thermokeratoplasty;Hyperopic astigmatism |
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