| The Effect of Amniotic Membrane Gra ft on the Inhibition of Corneal Haze in Rabbit. |
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Heung Myong Woo, Man Soo Kim, Oh Kyeong Kweon |
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Department of Ophthalmology, College of Medicine, The Catholic Univesity of Korea, Kangnam St.Mary 's Hospital, Seoul, Korea. |
| 가토에서 각막혼탁의 억제에 대한 양막이식의 효과 |
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우흥명(Heung Myong Woo),김만수(Man Soo Kim),권오경(Oh Kyeong Kweon) |
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| Abstract |
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This study was performed to investigate histopathologically the effect of amniotic membrane graft (AMG)on haze in deep stromal wound of cornea. The excimer laser phototherapeutic keratectomy (PTK)was used to create the wound model of 150 micrometerdepth, 6.0 mmdiameter area in 72 white rabbitsbilaterally.Each eye was randomized to three groups: control (topical antibiotic alone), contact lens application and AMG. Corneal haze,the number of anterior stromal keratocytes and thickness of the regenerated stroma were evaluated after treatments in corneal wound, and also the morphological changes of anterior stroma connected with corneal haze were analyzed. The score of corneal haze in AMG group was significantly lower than those in the others at postoperative 3 days, 2, 4, 6 and 8 weeks. The anterior stromal keratocytes in AMG group significantly remained more than those in the others at postoperative 3 days. The number of keratocytes and thickness of regenerated stromal tissue in wound area of AMG group were statistically lower as compared with those of the other groups at postoperative 4 weeks. The architecture of stromal lamella was most reg-ular in AMG group. Transmission electron microscopic observation demonstrated that the cells in anterior stroma were the active fibroblastic cells with prominent rough endoplasmic reticulum at postoperative 8 weeks. These findings indicate that corneal haze is closely connected with proliferation of corneal stroma , suggesting that AMG on deep corneal stromal wound reduces corneal haze by preventing proliferation of abnormal collagen and fibroblasts at the anterior stroma of the wound area. |
| Key Words:
Amniotic membrane graft (AMG);Corneal haze;Corneal stroma;Excimer laser;Fibroblasts |
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