This study was a prospective nonrandomized study of 105 patients (60 women and 45 men; age 23.97 ± 5.51 years [mean ± SD], range, 18–36), 60 of whom were scheduled to undergo LASIK. The protocol adhered to the tenets of the Declaration of Helsinki and received approval from an institutional review board. Informed consent was obtained from each subject after a thorough discussion of the benefits and the known risks of the procedure. In 105 young myopia patients, the mean preoperative spherical equivalent (SE) of refraction was −5.40 ± 1.76 D (range, −10.25 to −1.63), with mean astigmatism of −0.62 ± 0.53 D (range, −2.00 to 0). The mean keratometric value, central corneal thickness (CCT), and anterior chamber depth (ACD) were 43.30 ± 1.37 D (range, 38.10–46.20), 545.39 ± 24.10 μm (range, 486–601), and 3.26 ± 0.25 mm (range, 2.47–3.71), respectively. In 60 patients who underwent the LASIK procedure, the mean ablation depth was 78.55 ± 12.99 μm (range, 29–105). The ablation ratio, residual bed thickness (RBT), and RBT/CCT were calculated according to ablation depth and CCT. The preoperative examination included uncorrected visual acuity (UCVA) and best spectacle-corrected visual acuity (BSCVA), manifest and cycloplegic refraction, intraocular pressure (IOP), topography, slit lamp microscopy, and dilated indirect funduscopy. The preoperative values for keratometry, CCT, and ACD were acquired by the Scheimpflug tomography system (Pentacam; Oculus GmbH, Wetzlar, Germany). All enrolled patients were confirmed to have stable refraction and to be free of ocular and systemic disease. Contact lens wear was discontinued 2 weeks before LASIK for soft lenses or 4 weeks before LASIK for hard lenses.