TY - JOUR
AU - EDRINGTON, TIMOTHY B.
AB - prescribing for astigmatism BY BRETT LARSON, OD, & TIMOTHY B. EDRINGTON, OD, MS, FAAO lens with higher oxygen transmis- P lenses are generally the optimal therapy for sibility would minimize adverse effects on corneal physiology. the vision needs of patients who have irregular The highest amount of cylinder available to us in a toric silicone corneal surfaces. Although a spherical GP lens hydrogel lens was –2.25D. It’s will take care of most visual needs, it is not un- possible to prescribe a toric soft lens with a higher cylinder power, common to find uncorrected Brazeau showed that a soft piggy- but because high-cylinder options astigmatism in the over-refraction back lens will change an over-re- are currently only available in that prevents patients from fraction by about 23 percent of lower-Dk materials, we opted to achieving their best vision. As the soft lens power. For example, prescribe a silicone hydrogel. practitioners, we often struggle to when combined with a GP lens, a Note that in many cases changing find a solution that will provide +4.00D spherical soft lens will a piggyback lens from a spherical optimal vision while maintaining change the over-refraction by ap- to a toric design may require 
TI - Piggybacking With Soft Torics
JF - Contact Lens Spectrum
DO - 10.1097/01.CLS.0000383038.06602.be
DA - 2010-06-01
UR - https://www.deepdyve.com/lp/wolters-kluwer-health/piggybacking-with-soft-torics-iIV0GKZH0j
SP - 14
EP - 14
VL - 25
IS - 6
DP - DeepDyve
ER -