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. 1994 Dec;78(12):895–898. doi: 10.1136/bjo.78.12.895

Clinical comparison of the ProTon and Tono-Pen tonometers with the Goldmann applanation tonometer.

A Midelfart 1, A Wigers 1
PMCID: PMC504987  PMID: 7819170

Abstract

A clinical evaluation of a new electron ProTon tonometer was performed comparing the values of intraocular pressure (IOP) measured using this instrument with those determined by a similar instrument, Tono-Pen XL, and by Goldmann applanation tonometry. The mean IOP measured in 106 eyes with the ProTon tonometer was not significantly different from that determined with Goldmann applanation, while the IOP values measured with Tono-Pen XL were significantly lower. The 95% limits of agreement between applanation tonometry and ProTon tonometry were between -4 mm Hg and 5 mm Hg and between applanation tonometry and Tono-Pen XL tonometry between -3 mm Hg and 8 mm Hg. The ProTon tonometer appears to have a higher level of accuracy than the Tono-Pen XL tonometer in clinical practice.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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