title: Understanding the accommodating intraocular lens.
abstract: OBJECTIVE
  To review current accommodating intraocular lens (IOL) designs and introduce a new design consisting of a plus lens and a minus lens.
  
  
  METHODS
  Cornea Consultants of Boston, Boston, Massachusetts, USA.
  
  
  METHODS
  Computer simulation studies of a model eye calculated the pseudoaccommodation range with different powers of 1 IOL or of 2 IOLs acting as a doublet.
  
  
  RESULTS
  The doublet consisting of a convex (plus) lens and a concave (minus) lens gave a greater range of power change than a single convex lens or a doublet consisting of 2 convex lenses. The greater range of power results from the plus lens moving forward.
  
  
  CONCLUSIONS
  The results show that an IOL design consisting of positive and negative lenses that move closer or farther from each other offers a greater range of pseudoaccommodation than other designs.
authors.affiliation: Cornea Consultants of Boston, Boston, MA 02114, USA.
authors.forename: Azhar
authors.initials: A
authors.lastname: Rana
authors.forename: David
authors.initials: D
authors.lastname: Miller
authors.forename: Peter
authors.initials: P
authors.lastname: Magnante
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D007910:Lenses, Intraocular; D008962:Models, Theoretical; D011305:Presbyopia / Q000503:physiopathology*; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology*