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Published on: May 3, 2016
A general relation between changing surface radii of flexing soft contact lenses
Abstract:
Many models have been proposed to describe the simultaneous changes which occur in front and back radii of curvature of a hydrogel contact lens flexing or "wrapping" onto the surface of a human eye. This study first discusses the concept that the change in front radius (delta r1) may be related to the change in back radius (delta r2) by a simple constant which may change with lens design, and then develops a separate new general relation from observed lens behavior: delta r1/delta r2 = 1 - 0.05 F, where F is unflexed lens back vertex power.
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