Traditionally changes in corneal thickness associated with contact lens wear have been measured with optical pachometers after the lenses are removed from the cornea. In studies of corneal response to the extended wearing of hydrogel and silicone elastomer contact lenses, optical pachometry measurements may be improved by uninterrupted lens wear during the measurements. Using four flexible lens types differing in design and thickness, a single observer made pachometric measurements both with and without the lenses in place on eight subjects. This study demonstrates that valid and reliable measures of corneal thickness may be made without removing flexible lenses from the eye.
Received December 18, 1984; revision received July 29, 1986.
* Optometrist, Member of Faculty, F.A.A.O.
A. Christopher Snyder
School of Optometry/The Medical Center
The University of Alabama at Birmingham
Birmingham, Alabama 35294
© 1987 American Academy of Optometry