New bifocal designs in hyper-oxygen materials.
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.
Ghormley
N Rex
NR
Vision Care Consultants, Tesson Ferry Professional Center, St. Louis, MO 63128, USA. rexghormley@myexcel.com
D003263:Contact Lenses, Hydrophilic; D003315:Cornea / Q000378:metabolism; D004869:Equipment Safety; D006801:Humans; D010100:Oxygen / Q000378:metabolism*; D010539:Permeability; D011474:Prosthesis Design
D010100:Oxygen