Corneal Thickness Changes Associated with Daily and Extended Contact Lens Wear
- 1 October 1983
- journal article
- research article
- Published by Wolters Kluwer Health in Optometry and Vision Science
- Vol. 60 (10) , 830-838
- https://doi.org/10.1097/00006324-198310000-00004
Abstract
Human corneal thickness was measured during daily wear of hydrogel contact lenses and then during the initial 2 weeks extended wear of hyper-thin (0.035 mm), low water content (38.6%), hydrogel lenses (polymacon). Results show that subjects wearing standard thickness (0.12 mm) and ultra-thin (0.07 mm) hydrogel lenses of low water content for daily wear will exhibit a diurnal swelling of the cornea. Subjects wearing hyper-thin (0.035 mm) low minus power hydrogel contact lenses of low water content for extended wear will exhibit overnight (closed eye) swelling of the cornea followed by a deswelling throughout the day (open eye). The degree of swelling and deswelling can vary greatly among individual subjects.Keywords
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