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Measurement of Intraocular Pressure After Epikeratophakia
Paul F. Olson, MD;
Marguerite B. McDonald, MD;
Theodore P. Werblin, MD, PhD;
Herbert E. Kaufman, MD
Arch Ophthalmol. 1983;101(7):1111-1112.
Abstract
• New forms of refractive surgery result in corneas that are nearly doubled in thickness. To test the reliability of standard instrumentation for the measurement of intraocular pressure in such eyes, the MacKay-Marg tonometer was used on eye bank eyes with and without epikeratophakia lenticules and/or bandage contact lenses. The Goldmann applanation prism in the hand-held Perkins portable tonometer and the MacKay-Marg tonometer were used to measure IOP in vivo in a primate eye with an epikeratophakia graft. Measurements were compared with actual intraocular readings from a transducer. The MacKay-Marg tonometer was reliable at pressures above 20 mm Hg; the extra thickness of the graft and/or the rigidity of the contact lens impaired the accuracy below 20 mm Hg. The Goldman tonometer was accurate over the entire range of pressures.
Author Affiliations
From the Lions Eye Research Laboratories, Louisiana State University (LSU) Eye Center, LSU Medical Center School of Medicine, New Orleans.
Footnotes
Accepted for publication Aug 31, 1982.
Reprint requests to LSU Eye Center, 136 S Roman St, New Orleans, LA 70112 (Dr McDonald).
This investigation was supported in part by Public Health Service grants EY02580 (Dr Kaufman) and EY02377 (Dr Kaufman) from the National Eye Institute, an unrestricted grant from Research to Prevent Blindness, Inc, New York, and core grant 5-P40-RR00164 from the National Institutes of Health to the Delta Regional Primate Research Center, Coving, La.
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