LASIK (laser-assisted in situ keratomileusis) is a type of refractive laser eye surgery performed by ophthalmologists for correcting myopia, hyperopia, and astigmatism. The procedure is generally preferred to photorefractive keratectomy, PRK, (also called ASA, Advanced Surface Ablation) because it requires less epoch for the patient's recovery, and the patient feels less pain, overall; however, there are instances where PRK/ASA is medically indicated as a better alternative to LASIK.
In any case, higher codification aberrations are measured in õm (micrometers) on the wavescan taken during the pre-op examination, while the smallest beam bulk of FDA approved lasers is about 1000 times larger, at 0.65 mm. Orange County Lasik Thus imperfections are inherent in the procedure and a generalization why patients experience halo, glare, and starburst even with insufficient naturally dilated pupils in dim lighting.