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Mid – long-term clinical outcomes of myopic astigmatism correction with topography-guided femtosecond laser-assisted astigmatic keratotomy combined with topography-guided customised ablation

Poster Details

First Author: J.Bai CHINA

Co Author(s):    L. Liu   T. Zhang                 

Abstract Details


To study new protocols in corneal astigmatism correction using topography-guided femtosecond laser-assisted astigmatic keratotomy (FS-AK) combined with topography-guided customized ablation (TCAT) by evaluating mid-long term safety and accuracy.


Chongqing Ophthalmological Hospital


10 eyes (5 patients) with myopic astigmatism (-1.50D to -5.00D) were included. The topography-guided FS-AK was delivered with FS200 femtosecond laser (Wavelight, Alcon). After 3~6 months, residual astigmatism of 10 eyes was corrected with T-CAT. Among them, 8 eyes were treated with LASIK and 2 eyes were treated with LASEK. Visual acuity and refractions were followed up to 2 years.


After topography-guided FS-AK, corneal astigmatism of all eyes reduced, and coma increased compared with the pre-operative. The highest astigmatic correction was -3.75D, and the maximum deviation of astigmatic axis was less than 15 degree. Compared with that at 1-day postoperative, the regression of astigmatic correction was -0.63D at 3-months after topography-guided FS-AK. At 1-week after T-CAT surgeries, uncorrected visual acuity of all eyes achieved the pre-operative best-corrected visual acuity. Corneal astigmatism of all eyes were less than 0.50D. Subjects had no complains on visual quality. The change of corneal astigmatism was less than 0.50D at 2 years after surgeries.


Topography guided FS-AK combined with T-CAT offered safe, effective and predictable refractive outcomes in myopic astigmatism correction.

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