CClinicalTrials.gg
CompletedNCT02656836Updated Feb 5, 2020Results posted

Home Tonometry With the I-care Tonometer for Glaucoma

An observational study in Glaucoma, sponsored by Queen's University, Belfast. Completed at 1 site in United Kingdom. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2020-02-05.

Sponsored by Queen's University, Belfast · Observational

Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
20
Ages
18 Years and older
Sex
All
01

Study summary

The overall objective of the study is to scope the self-management for self-monitoring glaucoma using home tonometry.

Read the detailed description

Monitoring of glaucoma requires frequent evaluation of IOP and disease severity, typically with visual field tests. When a patient is diagnosed with glaucoma an optimum level of IOP (or target IOP) is determined based on patient's characteristics, such as severity of disease and life expectancy. In current models of care patients have their IOP measured at the clinic at different intervals. If the IOP is noted to be high, or above the patient's target, additional treatment is recommended. Accurate and frequent IOP measurements at different points in time are thus imperative.

Tonometry is usually conducted by clinicians in an eye clinic. Some tonometers (e.g., Icare) have the potential to be used by the individual for home monitoring of IOP for patients with suspected glaucoma/glaucoma. Self-monitoring of IOP via home tonometry will allow patients to undergo IOP measurements at different points in time (e.g., early morning and night-time, and it can help determine diurnal changes and spikes).

The overall objective of the current study is to conduct a feasibility pilot study on the home tonometer (Icare), acquiring initial experience with the Icare tonometer. For this purpose investigators will train up to 20 individuals on how to use the device. Investigators will ask them to record in a diary their IOP twice a day for a period of 2 weeks. Investigators will then compare IOP outcomes with the measurement taken at the clinic. Patients and clinicians will be masked to the IOP data.

02

Conditions studied

  • Glaucoma

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03

In context

Glaucoma

1,818 studies on the registry are indexed under Glaucoma; 231 are open to participants now.

This study's enrollment of 20 is below the median of 103 across 454 observational studies indexed under Glaucoma.

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Lead sponsor

Queen's University, Belfast is the lead sponsor of 113 studies on the registry; 14 are 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
No
Sampling method
Non-probability sample

Study population

Adults with glaucoma attending clinic

Inclusion criteria

  1. Attending the glaucoma clinic for monitoring (for glaucoma or ocular hypertension)
  2. Aged 18 years or over
  3. Patient deemed able to monitor their IOP at home (by themselves or a helper)

Exclusion criteria

Exclusion Criteria:

  1. Not receiving IOP monitoring (for glaucoma or ocular hypertension)
  2. Aged \<18 years
  3. Patients deemed unable to monitor their IOP at home (and do not have someone who can help them) e.g., apparent physical or cognitive impairments that will not allow for the use of a home tonometer
  4. Had surgery for their glaucoma (glaucoma surgery only; other surgeries included e.g., cataract surgery)
  5. Patient has preexisting corneal disease
05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
20 participants (actual)
Patient registry
No

Interventions

  • OtherHome tonometry, diagnostic study

    Evaluating intraocular pressure

    Also known as: I-care tonometer

06

What researchers measure

Primary outcomes

  1. Intraocular Pressure

    Intraocular pressure in mmHg units, obtained by tonometers. The investigators will determine agreement of intraocular pressure (IOP) measured using the home tonometer (patient) compared with IOP measured in the clinic.

    Time frame: Two weeks

Secondary outcomes

  1. Proportion of Patients Able and Willing to Use the Tonometer

    Proportion of patients willing to use the tonometer but are unable to. Patient feedback reported via questionnaire

    Time frame: Two weeks

  2. Proportion of Patients With an Adverse Event

    Any adverse event or complication associated with the use of the device. Expected side effects will be corneal erosion, and ocular irritation.

    Time frame: One month

07

Results

Posted Feb 5, 2020

Participant flow

Could not recruit target number of participants within the time frame

Participant flow — Overall Study
MilestoneHome Tonometry Group
Started9
Completed6
Not completed3

Outcome measures

PrimaryIntraocular Pressure

Intraocular pressure in mmHg units, obtained by tonometers. The investigators will determine agreement of intraocular pressure (IOP) measured using the home tonometer (patient) compared with IOP measured in the clinic.

Time frame:
Two weeks
Reported as:
Mean · mmHg
Intraocular Pressure
mmHgHome Tonometry Group
Intraocular Pressure-1.85 ± 3.95
SecondaryProportion of Patients Able and Willing to Use the Tonometer

Proportion of patients willing to use the tonometer but are unable to. Patient feedback reported via questionnaire

Time frame:
Two weeks

Results for this outcome have not been posted.

SecondaryProportion of Patients With an Adverse Event

Any adverse event or complication associated with the use of the device. Expected side effects will be corneal erosion, and ocular irritation.

Time frame:
One month

Results for this outcome have not been posted.

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Home Tonometry Group—0/6 (0%)0/6 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Home Tonometry Group
<=18 years0
Between 18 and 65 years0
>=65 years6
Sex: Female, Male
Sex: Female, Male(Participants)Home Tonometry Group
Female2
Male4
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Home Tonometry Group
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American0
White6
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(participants)Home Tonometry Group
United Kingdom6
08

Study locations

1 site
  • Centre for Experimental Medicine QUB
    Belfast, Co.Antrim BT12 6BA, United Kingdom
09

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 5, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02656836
Lead sponsor
Queen's University, Belfast
Collaborators
Belfast Health and Social Care Trust
Responsible party
Professor Augusto Azuara-Blanco (Professor, Queen's University, Belfast) — Principal investigator
First posted
Jan 15, 2016
Start date
Nov 2015
Primary completion
Apr 2016
Completion
Apr 2016
Results posted
Feb 5, 2020
Last update
Feb 5, 2020

Study contacts

Augusto Azuara-Blanco
principal investigator · Queen's University, Belfast

Oversight

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

Not currently enrolling

This study is completed, as verified in Jan 2020. You cannot join it, but the record below documents what was studied.

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