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مقاله
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Abstract
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Title:
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Evaluation of corneal biomechanics after excimer laser corneal refractive surgery in high myopic patients using dynamic Scheimpflug technology: 18 months follow up
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Author(s):
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Hassan Hashemi MD1 , Hadith Rastad PhD2, Reza Ghaffari MD3, Soheila Asgari PhD 1
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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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Hassan Hashemi
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Affiliation :(optional)
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Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran; Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran;
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E mail:
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research@noorvision.com
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Phone:
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02182401614
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Mobile:
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09121127421
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Purpose:
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To evaluate corneal biomechanical properties after femtosecond laser assisted in situ keratomileusis (FS-LASIK) and photorefractive keratectomy with mitomycin-C (PRK-MMC) in high myopic patients (>7.0D) at long time follow up using the Corvis ST (Oculus Optikgeräte GmbH).
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Methods:
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In this prospective comparative interventional case series, sixty patients were enrolled (30 patients in each group) with a manifest refraction spherical equivalent (MRSE) >7.0 diopter (D). The main outcome evaluated was change in corneal biomechanical properties at postoperative18 months. Corneal biomechanical parameters were evaluated at 3, 6 and 18 months using Corvis ST.
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Results:
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Preoperatively, mean MRSE was -8.65±1.51D in FS-LASIK and -8.04±1.70 D in PRK-MMC groups (P=0.15), and corneal thickness was 570.67±36.79µm and 507.12±32.55µm, respectively (P<0.001). At 18 months, Corneal biomechanical parameters change were not significantly different between the two procedures ( all p value > 0.05) except about peak distance (mm). At 12 months, peak distance change was greater in PRK-MMC than FS-LASIK (p value =0.026).
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Conclusion:
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This study demonstrated no significant differences in corneal biomechanical parameters change over time between the study groups.
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Attachment:
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