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The efficacy of topography-guided LASIK in treating asymmetric corneal astigmatism

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Session Details

Session Title: LASIK: Flap Morphology and Ablation Profile

Session Date/Time: Monday 09/10/2017 | 08:30-10:20

Paper Time: 08:48

Venue: Room 3.6

First Author: : J.Bai CHINA

Co Author(s): :                        

Abstract Details


to investigate the efficacy of topography-guided LASIK in treating asymmetrical corneal astigmatism


Department of Ophthalmology, Daping Hospital, Research Institute of Surgery, Third Military Medical University, Chongqing 400042, China


Forty-one patients (72 eyes) were prospectively enrolled in the study and were treated with LASIK at the Daping Hospital. They were randomly divided into a T-CAT group (37 eyes) that underwent topography-guided LASIK and a WF-optimized group (35 eyes) that underwent wavefront-optimized LASIK. Preoperative and postoperative best corrected visual acuity (BCVA), uncorrected visual acuity (UCVA), vertical coma (C7), horizontal coma (C8) and total third order coma were measured and the differences between the two groups were compared with paired t tests or independent t tests.


The postoperative UCVAs of the T-CAT group and WF-optimized group were 5.03±0.05 and 5.00±0.05, respectively, and the difference was statistically significant (t=3.00, P<0.01). Postoperative vertical coma and total third order coma were significantly reduced in the T-CAT group (t=14.801, 8.429, respectively, both P<0.01), and were significantly lower than that for the WF-optimized group (t=-7.799, -6.737, P<0.05)


Topography-guided LASIK can be an effective treatment for patients with asymmetrical corneal astigmatism. Treatment using this surgical technique significantly improved the visual acuity of patients.

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