Effect of femtosecond laser-created clear corneal incision on corneal topography

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• 作者：Sebastiano Serrao ; MD ; PhD ; ^{serrao@serraolaser.it" class="auth_mail}Author Vitae ; Giuseppe Lombardo ; MEng ; PhD ; Domenico Schiano-Lomoriello ; MD ; Pietro Ducoli ; MD ; Marianna Rosati ; BS ; Marco Lombardo ; MD ; PhD
• 刊名：Journal of Cataract and Refractive Surgery
• 出版年：April, 2014
• 年：2014
• 卷：40
• 期：4
• 页码：531-537
• 全文大小：1576 K

文摘

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Purpose

To evaluate changes in anterior corneal topography after femtosecond laser-created clear corneal incisions (CCIs).

Setting

Fondazione G.B. Bietti IRCCS, Rome, Italy.

Design

Comparative case series.

Methods

Phacoemulsification was performed through a 2.75 mm incision. In the study group, a 3-plane CCI was created using a 150 kHz femtosecond laser. In the control group, a single-plane angled CCI was created using disposable knives. Placido disk corneal topography was performed preoperatively and 1 week and 1 month postoperatively. Central curvature (simulated keratometry [K]) and local changes in anterior corneal topography at the CCI site were evaluated and compared between groups.

Results

No significant changes in the mean simulated K values were found in either group postoperatively (P > .05). The preoperative to 1-month postoperative mean simulated K ranged between 43.30 diopters (D) 卤 0.82 (SD) and 43.17 卤 0.82 D in the study group and between 43.34 卤 1.44 D and 43.29 卤 1.48 D in the control group. The method of CCI creation significantly influenced the changes in the anterior central topography during the first month postoperatively (P < .001). Greater steepening of the incision edges was found in the control group (mean 36.60 卤 4.13 D to 37.74 卤 2.39 D) than in the study group (mean 38.81 卤 2.91 D to 39.15 卤 4.48 D).

Conclusions

The 2.75 mm 3-plane femtosecond CCIs induced slight changes in the anterior central corneal topography, similar to single-plane angled manual incisions. Topographic differences between the femtosecond method and manual method were found at the CCI site.

Financial Disclosure

No author has a financial or proprietary interest in any material or method mentioned.