Refractive outcomes of femtosecond LASIK for myopic correction at Siriraj Hospital, Thailand.
OBJECTIVE
To evaluate refractive outcomes of myopic femtosecond LASIK at Siriraj Hospital, Thailand.


METHODS
A retrospective study of patients who underwent femtosecond LASIK at SiLASIK center Siriraj hospital, Mahidol University, Thailand,from April 2009 to April 2010 was conducted. All patients had completely normal preoperative eye examination. All LASIK procedures were performed using Intralase femtosecond laser (Abbott Medical Optics Inc (AMO)) and VISX star S4 excimer laser (AMO). Postoperative follow-up included visual acuity (ETDRS chart) and manifest refraction at 1 day, 1 week, 1 month and 3 months. The flap thickness was evaluated at 3 months using Visante optical coherence tomography (OCT Carl Zeiss Meditec).


RESULTS
One hundred and twenty eight eyes of 64 patients were included in the study. Mean preoperative manifest refraction spherical equivalent (MRSE) was -5.47 +/- 2.28 diopters (range, -1.88 to -12.63 diopters). At 3 months post-operation, the MRSE was -0.26 +/- 0.39 diopters (range, + 0.25 to -2.00 diopters) and 95.31% were within + 1.00 diopter of intended correction. There was 98% of eyes achieved uncorrected distance visual acuity (UDVA) 20/40 or better and 73% achieved UD VA 20/20 or better There was 31% of eyes gained one line and 15% lost 1 line of corrected distance visual acuity (CDVA). The mean error of flap thickness (difference between actual and intended central flap thickness) was + 0.23 +/- 1.77 microm for 120 microm flap setting and + 0.22 +/- 0.97 microm for 110 microm flap setting. The flap morphology was planar configuration.


CONCLUSIONS
Myopic femtosecond LASIK at Siriraj Hospital provided satisfactory refractive outcomes and high accuracy of the flap thickness.
Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand. sabong@gmail.com
Sabong
S
Srivannaboon
Pornlada
P
Sunlakaviset
Panida
P
Kosrirukvongs
Pinnita
P
Prabhasawat
Wipawee
W
Booranapong
Suksri
S
Chotikavanich
Wasin
W
Po-Ngam
D000293:Adolescent; D000328:Adult; D005260:Female; D006785:Hospitals, University; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D012029:Refraction, Ocular; D012189:Retrospective Studies; D013785:Thailand; D016896:Treatment Outcome; D014792:Visual Acuity; D055815:Young Adult