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Manual vs femtosecond laser keratoplasties: astigmatism comparison

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Session Details

Session Title: Cornea: Surgical II

Session Date/Time: Tuesday 08/09/2015 | 14:00-16:00

Paper Time: 14:40

Venue: Room 11

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.


Burjeel Hospital, Abu Dhabi, UAE.


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 mean arithmetic astigmatism magnitude before and after removal of sutures (ROGS) between groups. Mean astigmatism pre-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 post-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). ROGS-induced Vector computed astigmatism was greatest in Manual DALK (5.49±1.82 D) and lowest in Femto DALK (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 of the authors has significant investment interest in a company producing, developing or supplying product or procedure presented

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