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Manual versus femtosecond laser keratoplasties: astigmatism comparison

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Session Details

Session Title: Refractive Corneal Surgery

Session Date/Time: Wednesday 17/09/2014 | 08:00-09:30

Paper Time: 08:00

Venue: Boulevard A

First Author: : E.Borasio UNITED ARAB EMIRATES

Co Author(s): :                  

Abstract Details


To assess the astigmatic changes between before and after complete suture removal (ROGS) in eyes with keratoconus undergoing keratoplasty with either a manual technique or using the femtosecond laser.


Moorfields Eye Hospital Dubai


Retrospective comparative consecutive case series involving 82 eyes which had undergone manual versus 68 eyes which had undergone IntraLase femtosecond laser keratoplasty.


No statistically significant differences were detected in the mean arithmetic astigmatism magnitude either before or after removal or graft sutures (ROGS) between the groups. Mean astigmatism before ROGS: Manual v Femto PK (4.65±2.17; 6.32±2.91 D; p: 0.15); Manual v Femto DALK (8.50±4.50; 4.25±1.97 D; p: 0.20); Femto PK v Femto DALK (6.32±2.91; 4.25±1.97 D; p: 0.14). Mean astigmatism after ROGS: Manual v Femto PK (5.17±2.60; 5.57±2.18 D; p: 0.68); Manual v Femto DALK (6.62±3.45; 6.67±3.50 D; p: 0.99); Femto PK v Femto DALK (5.57±2.18; 6.67±3.50 D; p: 0.54). The ROGS-induced Vector computed astigmatism was greatest in the Manual DALK group (5.49±1.82 D) and lowest in the Femto DALK group (3.18±1.87 D, p>0.05).


Manual and Femtosecond laser PK and DALK induced similar magnitudes of postoperative and post-ROGS astigmatism and the use of the femtosecond laser was not associated with lower astigmatism.

Financial Interest:

One or more of the authors... has significant investment interest in a company producing, developing or supplying product or procedure presented

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