title: New bifocal designs in hyper-oxygen materials.
abstract: OBJECTIVE
  To address the question, "How can we increase the bifocal contact lens market?"
  
  
  METHODS
  The design, lens parameters, and the results of a clinical study with this new bifocal lens are discussed. The contact lens market and current bifocal contact lens designs are reviewed and factors that should be considered in future lens designs are recommended.
  
  
  RESULTS
  The only hyper-oxygen bifocal available is the Menifocal Z (Menicon, Nagoya, Japan).
  
  
  CONCLUSIONS
  Simultaneous vision, the optical design used in most soft lens bifocals, reduces visual performance. Industry and vision scientists need to develop new bifocal lens designs to help the bifocal contact lens market grow.
authors.affiliation: Vision Care Consultants, Tesson Ferry Professional Center, St. Louis, MO 63128, USA. rexghormley@myexcel.com
authors.forename: N Rex
authors.initials: NR
authors.lastname: Ghormley
mesh_terms: D003263:Contact Lenses, Hydrophilic; D003315:Cornea / Q000378:metabolism; D004869:Equipment Safety; D006801:Humans; D010100:Oxygen / Q000378:metabolism*; D010539:Permeability; D011474:Prosthesis Design
chemical_list: D010100:Oxygen