Jul 26, 2012

Evaluation of the self-tonometer Icare ONE in comparison to Goldmann applanation tonometry

Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
V WitteR Guthoff


The aim of this clinical study was to demonstrate the practicability of self-measured intraocular pressure and to evaluate the reliability by comparing the data with those obtained by Goldmann applanation tonometry (GAT). A total of 40 patients aged between 44 and 82 years with glaucoma were introduced to the handling of the tonometer. The self-measurements were done for 1-3 days following the medical measurement by GAT. The data were saved as "correct" or in the case of wrong handling as "false". The impressions of the patients were obtained by a questionnaire. A total number of 191 single measurements were registered by the Icare ONE and of these there were 97 (50.8%) signed "false". Of the patients 45% reached a maximum difference of ±5 mmHg between GAT and self-measurement in every single measurement. In the subgroup of under 60-year-old patients 70% reached this result. There were no indications of a systematic error. Of the probands 60% considered the handling of the Icare ONE as difficult. Nevertheless, 80% could imagine using the self-tonometer at home. The differences between the self-measurements and the GAT were highly fluctuating in some cases. In the group of patients younger than 60 years the agreement was better,...Continue Reading

  • References24
  • Citations6


  • References24
  • Citations6

Mentioned in this Paper

Intraocular Pressure Test
Subgroup A Nepoviruses
Medical Device Design
Physiologic Intraocular Pressure
Client Satisfaction
Intraocular Pressure Disorder

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