title: Optimized prolate ablations with the NIDEK CXII excimer laser.
abstract: OBJECTIVE
  To describe a novel excimer laser ablation algorithm, termed optimized prolate ablation (OPA), that uses both topography and ocular aberrometry and maintains or improves the natural corneal shape postoperatively.
  
  
  METHODS
  A descriptive article outlining the theory behind this OPA algorithm.
  
  
  RESULTS
  The theoretical changes to the ablation algorithm described in this article will produce a prolate cornea postoperatively.
  
  
  CONCLUSIONS
  OPA treated eyes will have equal or better visual quality than preoperatively because age-related changes from lenticular spherical aberration are measured and treated.
authors.affiliation: Holladay Consulting Inc, Bellaire, Tex 77402-0717, USA. holladay@docholladay.com
authors.forename: Jack T
authors.initials: JT
authors.lastname: Holladay
authors.forename: Harkaran S
authors.initials: HS
authors.lastname: Bains
mesh_terms: D000465:Algorithms; D002138:Calibration; D003315:Cornea / Q000503:physiopathology / Q000601:surgery*; D019781:Corneal Topography; D004867:Equipment Design; D006801:Humans; D054018:Lasers, Excimer; D018903:Photorefractive Keratectomy / Q000295:instrumentation / Q000379:methods*; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000503:physiopathology; D054140:Refractive Surgical Procedures; D014792:Visual Acuity