title: Hyperopic shift and the use of masking agents in excimer laser superficial keratectomy.
authors.forename: C
authors.initials: C
authors.lastname: Liu
mesh_terms: D003315:Cornea / Q000601:surgery; D003316:Corneal Diseases / Q000601:surgery*; D006801:Humans; D006956:Hyperopia / Q000209:etiology*; D065347:Hypromellose Derivatives; D053685:Laser Therapy; D008747:Methylcellulose / Q000031:analogs & derivatives; D011183:Postoperative Complications / Q000209:etiology*
chemical_list: D065347:Hypromellose Derivatives; D008747:Methylcellulose