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مقاله
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Abstract
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Title:
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Assessment and comparison of corneal biomechanics by dynamic scheimpflug imaging between Femtosecond assisted thin flap LASIK and PRK in high myopia
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Author(s):
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Hassan Hahsemi, Reza Ghaffari, Soheila Asgari
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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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Reza Gafari
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Affiliation :(optional)
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Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
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E mail:
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ghaffaryreza@yahoo.com
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Phone:
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Mobile:
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09143411839
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Purpose:
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To comparison the change in corneal biomechanical data by dynamic scheimpflug imaging between Femtosecond assisted thin flap laser in situ keratomileusis (F-LASIK) and photorefractive keratectomy (PRK) in high myopic patients.
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Methods:
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A total of 60 patients (30 patients in each group) underwent Femtosecond assisted thin flap LASIK (110µm) and PRK+MMC were enrolled. The parameters of Corvis ST were measured before and 3 and 6 months after surgery.
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Results:
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There were no significant differences of MRSE and ablation depth between groups. In F-LASIK group, a greater increase in deformation amplitude and decrease in pachymetry, radius, and applanation time-1 were found. In PRK group, increase peak distance and decrease IOP were observed. The significant but weak correlation between a number of parameters (ablation depth, central corneal thickness, residual stromal bed, and percentage anterior tissue serve) and the changes in Corvis ST biomechanical data were observed.
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Conclusion:
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This study demonstrated a significant change in Corvis biomechanical data after refractive surgery in high myopic patients after both PRK and F-LASIK. The magnitude of change was greater in the LASIK group and a different pattern of response was noted with each type of surgery.
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Attachment:
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