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Br J Ophthalmol 2009;93:992-996 doi:10.1136/bjo.2008.144261
  • Review

Advances in telemetric continuous intraocular pressure assessment

  1. T Kakaday1,
  2. A W Hewitt2,
  3. N H Voelcker3,
  4. J S J Li1,
  5. J E Craig2
  1. 1
    School of Computer Science, Engineering & Mathematics Flinders University, Adelaide, Australia
  2. 2
    Department of Ophthalmology, Flinders University, Adelaide, Australia
  3. 3
    School of Physics, Chemistry and Earth Sciences, Flinders University, Adelaide, Australia
  1. Correspondence to Dr J Craig, Department of Ophthalmology, Flinders Medical Centre, Flinders University, Bedford Park, South Australia, 5042, Australia; jamie.craig{at}flinders.edu.au
  • Accepted 13 December 2008
  • Published Online First 24 February 2009

Abstract

With an ageing population showing an increasing prevalence of glaucoma, there is a pressing demand for continuous intraocular pressure (IOP) measurements which could surpass clinic-based measurements such as routine applanation tonometry. Glaucoma patients have fluctuations in IOP, and it has been proposed that these fluctuations are relevant to glaucoma progression. In addition, interindividual and intraindividual variation in corneal thickness and rigidity can lead to significant and poorly quantitated errors in applanation-based methods of estimating IOP. Microelectrical mechanical systems and complementary metal oxide semiconductor-based technology has enabled the development of smart miniaturised devices by augmenting the computational ability of microelectronics with capabilities of microsensors and microactuators. This review addresses various sensor technologies and both invasive and non-invasive approaches to the measurement of IOP. Advances in wireless communication (telemetry) between the implanted sensors and the external readout device are reviewed. In addition, biocompatibility of implantable sensors is discussed.

Footnotes

  • Funding This work was supported by the Ophthalmic Research Institute of Australia and the Australian Research Council.

  • Competing interests None.

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