| Corneal Edema Induced by Balafilcon A Contact Lens in Rabbits. |
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Kyu Mee Kay, Jong Wook Hong, Hyo Myung Kim |
1Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Korea.
2Department of Ophthalmology, Guro Hospital, Korea University College of Medicine, Korea. hongjw@kumc.or.kr
3Department of Ophthalmology, Anam Hospital, Korea University College of Medicine, Korea. |
| 백색 가토에서 Balafilcon 재질 콘택트 렌즈에 의한 각막 부종 |
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계규미 ( Gye Gyu Mi ) , 홍종욱 ( Hong Jong Ug ) , 김효명 ( Kim Hyo Myeong ) |
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| Abstract |
PURPOSE
To compare the increase of corneal thickness by Balafilcon A (PureVision(R)) with that by HEMA hydrogel in rabbits. METHODS: 15 eyes of New Zealand white rabbits were divided into three groups. Each group was as follows: Group 1 recieved tasorraphy without contact lens insertion, group 2 had PureVision(R) lens insertion with tasorraphy and group 3 had New hypa day(R) lens insertion with tasorrhaphy. After anterior segment examination, tasorrhaphy was performed in group 1 and corneal thickness was measured at 24 and 48 hours. Five PureVision lenses were applied to left corneas of group 2 and transient tasorrhaphy was performed. After 24 and 48 hours, corneal thickness was measured. Same procedure was made in group 3 by applying five New hypa day(R) lenses on left eyes. Anterior segment was reexamined with slit lamp at 24 and 48 hours in all three groups. RESULTS: Baseline corneal thickness showed no statistical difference among three groups (p>0.05). At 24 hours, the corneal thickness of group 3 (New hypa day(R) lens inserted) increased significantly than that of the other groups (p<0.05). At 48 hours, the corneal thickness of group 2 and 3 increased significantly than group 1 (p<0.05), but there was no statistical difference between two groups (p>0.05). CONCLUSIONS: Balafilcon A contact lens which has high oxygen transmissibility of silicone with high water content of hydrogel, induce less corneal swelling than conventional extended wear contact lens, HEMA hydrogel in short-term period. However long-term evaluation about Balafilcon A contact lens is required to get more data on corneal swelling and complications after long-term wearing. |
| Key Words:
Balafilcon A;Corneal edema;Hydrogel extended contact lens |
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