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Title:
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Clear corneal incision in phacoemulsification to decrease astigmatism and wavefront aberration: a comparison between single and paired opposite incisions
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Author(s):
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Hasan Razmjoo, MD, Alireza Peyman, MD, Nima Koosha,MD
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Presentation Type:
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Poster
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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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Hasan Razmju
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Affiliation :(optional)
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Professor, Isfahan University of Medical Sciences, Isfahan, Iran
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E mail:
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dr_razmjoo@yahoo.com
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Phone:
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Mobile:
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09131180292
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Purpose:
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effect of paired opposite 3.2mm clear corneal incisions on corneal astigmatism and wavefront aberration after phacoemulsification
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Methods:
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Fifty eyes randomized into paired incision or single incision groups. In first group two 3.2mm clear corneal incisions created at steepest meridian 180 degrees apart. In the single incision group only one 3.2mm incision at steepest meridian and a 1.5mm stab incision created. Subjects evaluated after 3 month regarding their refraction, keratometry, topography, and wavefront aberrations.
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Results:
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Post-operative corneal plane astigmatism was 1.86 +/- 0.87 diopter in the single incision, and 1.30 +/- 0.91 in the paired opposite incision groups (p: 0.30). Keratometric surgically induced astigmatism was1.01 +/- 1.02 diopter in single incision and 1.59 +/- 0.70 in paired opposite incision groups (p: 0.02). Topographic mean 3mm central irregularity was 1.72 +/-0.45 and 1.68 +/- 0.66 in single and paired incision groups respectively (p: 0.80).The higher order wavefront aberration was 0.66 +/- 0.31 micron and 0.68 +/- 0.38 in single and paired incision groups respectively (p: 0.84).
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Conclusion:
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Paired opposite 3.2mm clear corneal incisions at steepest meridian are more effective than conventional incision for reduction of astigmatism. We were not able to disclose any advantage for this technique regarding corneal regularity and wavefront optical aberrations.
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Attachment:
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