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Visual outcomes after small incision lenticule extraction and comparison to Topolyser customised ablation treatment for correcting myopia and symmetrical myopic astigmatism

Poster Details

First Author: J.Bai CHINA

Co Author(s):                        

Abstract Details


To investigate the accuracy and predictability of the SMILE and T-CAT surgery among patients with myopia and symmetrical myopic astigmatism.


Department of Ophthalmology Daping Hospital affiliated to the Army Medical University,Chongqing, China


Patients with myopia (-1.00 to -10.00D) and myopic astigmatism (0 to -5.00D) were selected. Examined by PENTACAM, keratoconus was excluded and aberration of anterior corneal surface (C7、C8) was limited to 0.15. Patients were grouped into SMILE group (60 eyes) and T-CAT group (60 eyes). The VisuMax femtosecond laser was used in SMILE group (Astigmatic axis label,accurate centralized positioning and liquid infiltration). FS200 and EX500 were used respectively to first make corneal flap and then perform T-CAT. Corneal topography, OQST and contrast sensitivity were examined before and after surgery. Anti-inflammatory, anti-bacterial and artificial lacrima agents were used after surgery.


Surgeries were successful in both groups without complications. Surgery-related pain index was 2 in SMILE group and 4 in T-CAT group. There were 4 eyes and 3 eyes respectively in SMILE group and T-CAT group which UCVA one day after surgery failed to achieve BCVA before surgery, while there were 16 eyes and 12 eyes respectively which UCVA exceeded BCVA. No statistical differences were observed between two groups in UCVA, contrast sensitivity and MTF one month and three month after surgery. Aberration of anterior corneal surface after surgery were larger than before.


Both SMILE and T-CAT surgery had excellent accuracy and predictability for correcting myopia and symmetrical myopic astigmatism. However, SMILE procedure showed less surgery-related pain and less spherical aberration change.

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