Comparison of surgically-induced astigmatism between femtosecond laser and manual clear corneal incisions

Session Details

Session Title: Rotational Stability & Outcomes

Session Date/Time: Monday 24/09/2018 | 14:30-16:00

Paper Time: 15:38

Venue: Room A4

First Author: : I.Rebrikov RUSSIA

Co Author(s): :    O. Shilovskikh   A. Ulyanov   B. Laptev              

Abstract Details

Purpose:

To compare surgically induced astigmatism (SIA) introduced by femtosecond laser clear corneal incisions (CCIs) and manually created CCIs.

Setting:

Ekaterinburg Center IRTC Eye Microsurgery, Ekaterinburg, Russia

Methods:

The study included 142 eyes of 140 patients. There were 3 patients groups: groups I,II – 71 eyes received manual CCIs, width 2.2 mm, created with steel keratome by two experienced surgeons; group III – 71 eyes recieved femtosecond laser CCIs, width 2.2-2.4 mm with internal trapezoid offset. Keratometric values were estimated preoperative, 1 day postop and during follow-up. Mean follow-up was 8,3 +/- 3,6 months in group I, 12 +/- 3,25 months in group II and 6,9 +/- 0,3 months in group III. SIA was assessed by vector analysis using Holladay formula at 1 day postop and during follow-up.

Results:

There was no statistically significant difference between groups in central corneal thickness, preoperative keratometric values and preoperative corneal astigmatism. SIA was 0,69 +/- 0,1 D in group I, 0,65 +/- 0,11 D in group II and 0,57 +/- 0,07D in group III at 1 day postop. No statistically significant difference between groups (p>0,05) was found. During follow-up period SIA was 0,51 +/- 0,07 D in group I, 0,53 +/- 0,08 D in group II and 0,27 +/- 0,03 D in group III.

Conclusions:

Surgically induced astigmatism introduced by femtosecond laser CCIs was significantly lower (p<0,05) compared to manually created CCIs in follow-up period.

Financial Disclosure:

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