Intraoperative measurement of intraocular pressure in vitrectomized aphakic air-filled eyes using the Tono-Pen XL

S. S. Badrinath*, R. Vasudevan, R. Murugesan, S. Basti, A. D. Nicholson, P. Singh, L. Gopal, T. Sharma, S. B. Rao, C. Abraham

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The Tono-Pen XL (Bio-Rad, Santa Ana, CA) was compared with manometer readings for intraoperative measurement of intraocular pressure (IOP) in 40 eyes of 40 consecutive patients after vitrectomy, lensectomy, and fluid-air exchange. Tono-Pen readings corresponding to manometer readings of 10, 20, 30, 40, and 50 mmHg were obtained in a masked fashion with a randomized sequence of manometer readings. A correlation was obtained between the manometer and Tono-Pen readings (r = 0.96 in emmetropic eyes and r = 0.93 in myopic eyes). The regression curve that represents the calibration curve of Tono-Pen in terms of the manometer readings for air-filled vitrectomized eyes was obtained. Any Tono-Pen reading can be easily translated into the corresponding manometer reading by referring to the curve. The Tono-Pen can therefore be effectively used to accurately determine intraoperative IOP in eyes undergoing vitrectomy, lensectomy, and fluid-air exchange.

Original languageEnglish (US)
Pages (from-to)307-311
Number of pages5
JournalRetina
Volume13
Issue number4
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Ophthalmology

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    Badrinath, S. S., Vasudevan, R., Murugesan, R., Basti, S., Nicholson, A. D., Singh, P., Gopal, L., Sharma, T., Rao, S. B., & Abraham, C. (1993). Intraoperative measurement of intraocular pressure in vitrectomized aphakic air-filled eyes using the Tono-Pen XL. Retina, 13(4), 307-311. https://doi.org/10.1097/00006982-199313040-00007