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Lon S. Poliner, MD; Lawrence H. Schoch, MD

Arch Ophthalmol. 1987;105(2):200-202.

Abstract
• The accuracy and precision of tonometric methods in measuring intraocular pressure (IOP) was assessed in 24 eyebank eyes subjected to pars plana lensectomy/vitrectomy and air-fluid exchange. Intraocular pressure was measured in masked fashion with a Perkins' applanation tonometer, pneumatic applanation tonometer, and Schiotz' indentation tonometer; a mercury manometer served as a reference standard. Pneumatic tonometry underestimated actual IOP by as much as 25%, and Schiotz' indentation tonometry underestimated actual IOP by as much as 79%. Perkins' applanation tonometry was significantly more accurate in estimating actual IOP in gas-filled eyes than pneumatic tonometry or Schiotz' indentation tonometry.

Author Affiliations
From the Department of Ophthalmology, Washington University School of Medicine, St Louis.

Footnotes
Accepted for publication Aug 5, 1986.

Reprint requests to Retina Consultants Ltd, Suite 17413 East Pavilion, 4949 Barnes Hospital Plaza, St Louis, MO 63110 (Dr Schoch).

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ABSTRACT