| The Clinical Results of Intrastromal Corneal Ring Segment Implantation Using a Femtosecond Laser in Keratectasia. |
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Chang Il Ha, Suk Kyue Choi, Do Hyung Lee, Jin Hyoung Kim |
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Department of Ophthalmology, Ilsan Paik Hospital, Inje University College of Medicine, Ilsan, Korea. jhk0924@hanmail.net |
| 각막확장증 환자에서 펨토초레이저를 이용한 기질내 각막고리 삽입술의 단기 임상 성적 |
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하창일ㆍ최석규ㆍ이도형ㆍ김진형 |
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Department of Ophthalmology, Ilsan Paik Hospital, Inje University College of Medicine, Ilsan, Korea |
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| Abstract |
PURPOSE
To evaluate the clinical results of intrastromal ring segment (Keraring(R)) implantation using a femtosecond laser in patients with keratectasia. METHODS: Twenty eyes of 19 keratectatic patients (15 eyes of keratoconus and five eyes of post-LASIK keratectasia) who completed at least three months of postoperative follow-up were included in this study. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), spherical equivalent, keratometric value, corneal astigmatism, corneal higher order aberrations (HOA) and specular microscopy were determined or performed before and after surgery. In addition, intraoperative and postoperative adverse complications were recorded. RESULTS: UCVA improved in 13 out of 20 eyes (65%), and BSCVA improved in 16 out of 20 eyes (80%). At the postoperative examination there was no statistically significant reduction in the spherical equivalent with that observed at the examination before implantation. Conversely, there were statistically significant reductions in topographic mean K value and Sim K astigmatism, corneal total and coma-like HOA (p<0.05). On specular microscopy, there was no statistically significant difference between preoperative and postoperative endothelial cell density. There was one case of partial Descemet membrane detachment and one case of microperforation as a complication during surgery, which recovered over time without any treatment. CONCLUSION: Keraring(R) implantation appears to be an effective and safe procedure for improving visual acuity and stabilizing corneal refractive power in keratectactic patients. |
| Key Words:
Femtosecond laser;Intrastromal corneal ring segment;Keratectasia |
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