title: Multifocal corneal topographic changes after radial keratotomy.
abstract: Quantitative analysis of the central corneal refractive powers of both eyes of three patients demonstrated that, after radial keratotomy, the corneas tended to have a greater range of refractive powers than preoperatively, and that the corneas with a multifocal effect had a wider distribution of refractive powers than the corneas of eyes without this effect. It may be possible to intentionally achieve a multifocal lens effect by designing a refractive procedure to predictably widen the distribution of central corneal refractive powers.
authors.affiliation: Doheny Eye Institute, Department of Ophthalmology, University of Southern California School of Medicine, Los Angeles.
authors.forename: H
authors.initials: H
authors.lastname: Moreira
authors.forename: J J
authors.initials: JJ
authors.lastname: Garbus
authors.forename: M
authors.initials: M
authors.lastname: Lee
authors.forename: A
authors.initials: A
authors.lastname: Fasano
authors.forename: P J
authors.initials: PJ
authors.lastname: McDonnell
mesh_terms: D003315:Cornea / Q000473:pathology / Q000503:physiopathology*; D003316:Corneal Diseases / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007646:Keratotomy, Radial / Q000009:adverse effects*; D008875:Middle Aged; D011183:Postoperative Complications; D012030:Refractive Errors / Q000209:etiology*; D014792:Visual Acuity