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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

Purpose:

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

Setting:

Moorfields Eye Hospital Dubai

Methods:

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]).

Results:

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).

Conclusions:

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