title: The pseudoaccommodative cornea multifocal ablation with a center-distance pattern: a review.
abstract: To describe an excimer laser ablation architecture called the pseudoaccommodative cornea (PAC) that uses ocular aberrometry and aspheric ablation profiles to create a multifocal cornea.
  
  
  
  A descriptive article outlining the theory of the PAC algorithm.
  
  
  
  The topographic changes induced by PAC produce corneal multifocality.
  
  
  
  PAC-treated eyes have progressive concentric rings of center-distance and midperipheral-near power that enable functional vision at near, intermediate, and distance.
authors.affiliation: Cap Ophtalmologie, Cannes, France. ateland@club-internet.fr
authors.forename: Alain
authors.initials: A
authors.lastname: Telandro
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000465:Algorithms; D003315:Cornea; D019781:Corneal Topography; D004215:Distance Perception / Q000502:physiology*; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D011305:Presbyopia / Q000503:physiopathology / Q000601:surgery*