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Astigmatism following keratoplasty for keratoconus (PK v DALK; manual v femtosecond laser comparison)

Session Details

Session Title: Cornea Surgical II

Session Date/Time: Wednesday 09/10/2013 | 08:00-10:30

Paper Time: 09:28

Venue: Forum (Ground Floor)

First Author: : E.Borasio UNITED ARAB EMIRATES

Co Author(s): :    K. MINJAE              

Abstract Details


To assess the astigmatic changes between before and after complete suture removal (ROGS) in eyes with keratoconus undergoing keratoplasty.


Moorfields Eye Hospital Dubai


Consecutive case series involving 42 eyes undergoing either Penetrating (PK, N=32) or Big Bubble Deep Anterior Lamellar Keratoplasty (DALK, N=10). Comparison were also made between Manual and Femtosecond laser techniques (Manual PK [N=17], Femto PK [N=10], Manual DALK [N=4], Femto DALK [N=6]).


No statistically significant differences were detected in Mean Arithmetic Astigmatism Magnitude before ROGS between the groups: PK v DALK (5.29±2.49; 5.95±3.84 D; p: 0.64); 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); Manual PK v Manual DALK (4.65±2.17; 8.50±4.50 D; p: 0.23); Femto PK v Femto DALK (6.32±2.91; 4.25±1.97 D; p: 0.14). Likewise, no significant differences in astigmatism were detected following ROGS between the groups: PK v DALK (5.49±2.48; 6.65±3.48 D; p: 0.37); 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); Manual PK v Manual DALK (5.17±2.60; 6.62±3.45 D; p: 0.53); Femto PK v Femto DALK (5.57±2.18; 6.67±3.50 D; p: 0.54). The Vector computed ROGS-induced 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).


PK and DALK induced a similar magnitudes of postoperative and post-ROGS astigmatism and the use of the femtosecond laser did not cause a significant reduction in the astigmatism.

Financial Interest:

... has significant investment interest in a competing company

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