Optometrists at Barnard Levit use three different methods for assessing eye pressure (intraoculkar pressure). These instruments are called tonometers.

  • The Keeler Pulsair is used as a routine screener for some patients.
  • The Goldmann applanation tonometer is used for diagnosis and monitoring of patients with ocular hypertension or glaucoma. This instrument is considered to be the "gold standard" and its use forms part of the NICE Guidelines for Glaucoma.
  • The Pascal DCT is probably more accurate than the Goldmann because it compensates for corneal thickness and it also provides a measurement of the pulse pressure associated with the systolic-diastolic cardiac cycle which causes the eye pressure to flucyuate with heart beat