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Safety and efficacy of femtosecond LASIK with reverse side cut
Author(s) -
MENICACCI F,
FRUSCHELLI M,
MENICACCI C,
MENICACCI FL,
HADJISTILIANOU T
Publication year - 2010
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2010.3232.x
Subject(s) - keratomileusis , lasik , photorefractive keratectomy , medicine , ablation , ophthalmology , photoablation , surgery , astigmatism , femtosecond , cornea , laser , excimer laser , optics , physics
Purpose Laser in situ keratomileusis has several advantages over photorefractive keratectomy when performed properly in appropriate eyes. These include faster visual recovery, less discomfort after surgery, and milder and more predictable wound healing with less risk for haze. Lamellar corneal flap formation is the critical step in successful LASIK surgery. In our study we used femtosecond lasik with 90° hinge and 100 µm thickness flap wi Methods We performed femtosecond lasik in 58 eyes of 30 patients (mean age 35 y.o.) with AMO's IntraLase™ FS and STAR S4 IR™ Excimer Laser System. Criteria for inclusion were spherical myopia of ‐2 to ‐8.00 D, hyperopia up to 5 D, astigmatism miopic/hyperopic up to 4.50 D; stable refraction for 2 years; a best‐spectacle corrected vision (BSCVA) of at least 20/25 in each eye. Corneal flap thickness was 100µm and hinge position was 90 degrees with reverse 120° side cut. The optical zone of the ablation was from 6.5 to 7 mm, transition zone from 8 to 9 mm. Results Controls were made at 1day, 1 and 3 months. No flap decentration was observed in any case, we had one case of epithelial sloughing and one slightly irregular flap border. Spherical equivalent was within +/‐ 0.50 D and the cylinder was 0.50 D or less in all patients. Only 5% of patients showed marked discomfort and avversion to light for several days. Conclusion Flap creation is probably the most important step during laser in situ keratomileusis (LASIK), and complications during it can affect the rest of the procedure and cause permanent visual loss. In our exeprience the use of 100µm thickness flap with oblique side cut demonstrated itself to be a safe procedure with a very low complications rate and good refractive results.