title: Determining photorefractive keratectomy centration.
authors.forename: R
authors.initials: R
authors.lastname: Sun
mesh_terms: D003315:Cornea / Q000033:anatomy & histology* / Q000601:surgery*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D053685:Laser Therapy; D009216:Myopia / Q000601:surgery*; D011680:Pupil; D014792:Visual Acuity