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مقاله
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Abstract
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Title:
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Outcome of Complete Intrastromal Ring Implantation in Corneal Disorders: Pellucid Marginal Degeneration, Post-LASIK Ectasia, and Post-PKP Astigmatism
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Author(s):
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Mahmoud Jabbarvand, Hesam Hashemian, Ahmad Salamat Rad, Fatemeh Bazvand, Mehdi Khodaparast
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Presentation Type:
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Oral
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Subject:
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Cornea and Anterior Segment
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Others:
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Presenting Author:
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Name:
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Hesam Hashemian
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Affiliation :(optional)
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Ophthalmology research center, Farabi Eye Hospital, Tehran university of medical sciences
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E mail:
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shhlucky@yahoo.com
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Phone:
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Mobile:
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09126805097
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Purpose:
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To assess effect of complete intrastromal corneal ring implantations in patients with post LASIK ectasia, pellucid marginal degeneration (PMD), and post penetrating keratoplasty (PK) astigmatism.
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Methods:
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Complete intrastromal corneal ring implantation was performed on 17 eyes of 16 patients (5 post LASIK ectasia, 7 pellucid marginal degeneration and 5 post PK astigmatism) using femtosecond laser. Uncorrected and corrected distance visual acuity (UDVA, CDVA), refraction, keratometry, central corneal thickness (CCT), corneal biomechanical profile, and corneal aberrometry were evaluated preoperatively, and 1month, 3month, 6 month, and one year after surgery.
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Results:
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Both UDVA and CDVA improved significantly 12 months after operation in all three groups. Spherical and cylindrical refraction reduced in all three groups; although the reduction was not significant in post-LASIK group. Mean keratometry reduced significantly and CCT increased (nonsignificantly except for PMD group) in all study groups. Corneal biomechanical profile did not change significantly in any group. Spherical aberration increased significantly in all three groups. Higher order aberrations, coma, and trefoil experienced no significant changes except in PK group; where all of these three aberrations reduced significantly.
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Conclusion:
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Complete intrastromal corneal ring can be considered as a safe and effective alternative treatment in corneal ectatic disorders and post-PK astigmatism.
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Attachment:
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