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CompletedNCT01159340Updated Jul 9, 2010

Icare Versus Haag-Streit Applanation Tonometer

An observational study in Intraocular Pressure, sponsored by Icare Finland Oy. Completed at 1 site in Finland. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2010-07-09.

Sponsored by Icare Finland Oy · Observational

Study type
Observational
Enrollment
260
Ages
18 Years and older
Sex
All
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Study summary

The clinical performance of Icare ONE Tonometer TA02 was compared to a Goldmann type applanation tonometer (Haag-Streit). Data was collected according to ANSI Z80.10-2003 (ISO 8612.2) standard. Subjects were eligible for the study if they had no exclusion criteria specified in the ANSI/ISO standard. One eye from 260 subjects was selected for the study. The minimum sample size according to the standard is 150. One eye of each subject was selected for the study by an investigator, based on the history of the patient, results of an external examination of the eye with slit lamp, keratometry readings, and prior knowledge of the intraocular pressure (IOP) range. The Icare ONE Tonometer TA02 in comparison to the reference tonometer (Goldmann type tonometer).

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Conditions studied

  • Intraocular Pressure
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In context

Lead sponsor

Icare Finland Oy is the lead sponsor of 8 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Subjects were eligible for the study if they had no exclusion criteria specified in the ANSI/ISO standard. One eye from 260 subjects was selected for the study. The minimum sample size according to the ANSI standard is 150. In order to aid enrollment of at least 40 eyes in each pressure range (7-16 mmHg, >16 to \<23 mmHg and 23 mmHg or higher), subjects were invited to participate on the basis of prior knowledge of their IOP range. One eye of each subject was selected for the study by an investigator, based on the history of the patient, results of an external examination of the eye with slit lamp, keratometry readings, and prior knowledge of the IOP range.

Eligibility criteria

Inclusion Criteria:

  • subjects were eligible for the study if they had no exclusion criteria as specified by the ANSI/ISO standard

Subjects were selected according to the following exclusion criteria (as given in ANSI Z80.10-2003 and ISO 8612):

  • subjects with only one functional eye
  • those with one eye having poor or eccentric fixation
  • high corneal astigmatism (i.e. those eyes displaying an oval contact image with the Goldmann tonometer)
  • those with corneal scarring or who have had corneal surgery, including corneal laser surgery
  • microphthalmos
  • buphthalmos
  • contact lens wearers
  • dry eyes
  • lid squeezers (blepharospasm)
  • nystagmus
  • keratoconus
  • any other corneal or conjunctival pathology or infection
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Study design

Enrollment
260 participants (actual)
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Study locations

1 site
  • Glaucoma Service, Department of Opthalmology, Helsinki University Central Hospital
    Helsinki, 00029, Finland
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 9, 2010, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT01159340
Lead sponsor
Icare Finland Oy
First posted
Jul 9, 2010
Start date
May 2009
Completion
Nov 2009
Last update
Jul 9, 2010

Study contacts

Päivi Puska, MD, FEBO
principal investigator · Helsinki University Central Hospital

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2010. You cannot join it, but the record below documents what was studied.

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