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مقاله
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Abstract
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Title:
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Higher -Order Aberration’s changes after Customized Femtolaser assisted LASIK versus Laser Assisted Subepithelial Keratectomy for the Correction of High Myopia and Astigmatism
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Author(s):
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Seyed javad hashemian MD, rama pourmatin MD
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Presentation Type:
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Oral
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Subject:
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Lens and Cataract
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Others:
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Presenting Author:
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Name:
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Rama Pourmatin
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Affiliation :(optional)
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: Eye research center Rassoul-e-Akram hospital, Iran University of medical sciences and Iranian Eye Clinic, Tehran- IRAN.
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E mail:
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Ramapourmatin@gmail.com
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Phone:
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09122084577
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Mobile:
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09122084577
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Purpose:
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To compare the higher-order aberrations(HOAs) changes after Wavefront guided (WF-G) FA-LASIK versus WF-G LASEK in the treatment of high myopia and astigmatism.
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Methods:
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A prospective comparative case series study comprised 114 eyes with spherical component greater than -6.00 diopters (D) and cylinder lower than -3.00 D were assigned to 2 groups: 47 eyes were treated with FA-LASIK and 67 eyes with LASEK. Total RMS and HOAs value changes, Vertical and horizontal coma and spherical aberration were measured for each patient using a Shack-Hartmann wave- front sensor (Zywave, Bausch & Lomb, Rochester, NY) over a 6-mm pupil preoperatively and 6 months postoperatively.
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Results:
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Preoperatively the mean refractive spherical equivalent (MRSE) was -7.12 ±1.47D in FA-LASIK group and -6.97 ±. 96 D in LASEK group, at 6 months it was -.27 ±. 41and -.05±. 51 respectively. At 6 months, there were no any statistically significant differences in term of UCVA P=. 13, DCVA P=. 65,Total RMSvalue P=0.29. The mean Total HOA-RMSvalue at 6 mm pupil were .360 in LASIK and .361 in LASEK group that increased to .614 and .711 respectively P=0.05. Vertical coma P=. 005 and Spherical aberration p=. 000 were increased significantly in LASEK group.
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Conclusion:
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Both customized WF-G FA-LASIK and WF-G LASEK were safe and effectively treated eyes with high myopia and astigmatism, although HOA’s values increased significantly more in LASEK group.
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Attachment:
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