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The cornea swells in the posterior direction under hydrogel contact lenses
Author(s) -
Erickson Paul,
Comstock Timothy L.,
Doughty Michael J.,
Cullen Anthony P.
Publication year - 1999
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.1999.00470.x
Subject(s) - contact lens , cornea , refractive error , effects of long term contact lens wear on the cornea , lens (geology) , corneal topography , optics , materials science , ophthalmology , visual acuity , medicine , physics
Summary Two mathematical models were developed to describe the topographical corneal swelling response to hydrogel contact lenses and the effect of these changes on refractive error. In one, corneal thickness changes resulted in deformation of the anterior corneal surface. In the other, the posterior surface only was deformed. Refractive error, corneal thickness and corneal shape were monitored in a sample of adapted contact lens wearers with one eye patched for 4 h while wearing a soft contact lens. The experimental data were most consistent with the model in which the posterior surface only was deformed.