Clinical evaluation of the pressure phosphene tonometer in patients with glaucoma

Br J Ophthalmol. 2005 May;89(5):537-9. doi: 10.1136/bjo.2004.050922.


Aim: To evaluate the reliability of the pressure phosphene tonometer in comparison with the Goldmann applanation tonometer.

Methods: 45 consecutive patients with glaucoma (78 eyes) participated in the study. Eyes with previous eye surgery, a documented peripheral visual field defect, a refractive error of more than 5 dioptres, and patients who were unable to understand the procedure were excluded from the study. Intraocular pressure was measured with a pressure phosphene tonometer by one examiner and with a Goldmann applanation tonometer by two other examiners no more than 15 minutes apart. A second series of measurements was performed several weeks later on 34 patients (59 eyes). There was no communication between examiners or between examiner and patient regarding test results.

Results: No statistically significant correlation was found between the applanation tonometry values and those obtained with a pressure phosphene tonometer.

Conclusion: The pressure phosphene tonometer is not suitable for reliably measuring intraocular pressure.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Female
  • Glaucoma / diagnosis*
  • Glaucoma / physiopathology
  • Humans
  • Intraocular Pressure
  • Male
  • Middle Aged
  • Phosphenes*
  • Reproducibility of Results
  • Tonometry, Ocular / instrumentation
  • Tonometry, Ocular / methods*