AN ASPHERIC RGP KERATOCONUS LENS DESIGN

Title AN ASPHERIC RGP KERATOCONUS LENS DESIGN
Author, Co-Author Elizabeth Carroll
Topic
Year
1992
Day
Monday
Program Number
Poster 6
Room
Great Hall
Affiliation
Abstract Management of keratoconus has been dominated by the use of multicurve spherical lenses, however because of the widely varying central numerical eccentricity these lenses generally will not parallel the cornea. I will present case studies illustrating a lens geometry produced with a central spherical optic zone which is fixed at 20 degrees and an elliptical paracentral area. The central spherical region contains no flattening which is followed by rapid flattening between 20 and 30 degrees. The periphery then transitions into a constant flattening beyond 30 degrees. Due to the design's high eccentricity or rapid rate of flattening, the lens maintains a more desirable alignment with the topography of the cornea.
Affiliation of Co-Authors
Outline