Evaluation and testing of novel ocular tactile tonometry device

E. T. Enikov, P. P. Polyvás, R. Jančo, M. Madarász

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


This article describes the experimental analysis of a novel trans-scleral tonometer based on the use of multiple force sensors forming a mechanical stiffness sensor. This approach is similar to an instrumented form of digital palpation tonometry in which manual palpation is used to conclude the stiffness, and hence, the intraocular pressure of the eye. Force data obtained from these probes correlate with the intraocular pressure (IOP) of the eye. Enucleated porcine eyes were used to validate the approach. A noticeable amount of hysteresis has been observed during indentations. Analysis of the experimental data indicates that stress relaxation in the visco-elastic corneo-scleral shell is the primary factor of the observed hysteresis. Further tests under different indentation rates show that the novel tonometer is expected to have an accuracy of ± 1mmHg when the indentation rate is kept below 0.5 mm/sec for pressure range of 10-35 mmHg.

Original languageEnglish (US)
Title of host publicationMechatronics 2013
Subtitle of host publicationRecent Technological and Scientific Advances
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages8
ISBN (Print)9783319022932
StatePublished - 2014
Event10th International Conference on Mechatronics 2013 - Brno, Czech Republic
Duration: Oct 7 2013Oct 9 2013

Publication series

NameMechatronics 2013: Recent Technological and Scientific Advances


Other10th International Conference on Mechatronics 2013
Country/TerritoryCzech Republic

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering


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