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Home eye pressure checks with a smartphone for people with glaucoma

Tests home eye pressure monitoring in adults with glaucoma, compared with usual care.

Key facts

Who runs it
The University of Hong Kong
Where
Wong Chuk Hang, Hong KongSee the site
Trial code
Registry title
Impact of Home Intraocular Pressure Telemonitoring on Intraocular Pressure Control and Glaucoma Progression
Status
Recruiting
People taking part
142 people, planned
Started
18 Sept 2025
Expected to end
30 Jun 2028
Type of study
Interventional, 2 groupsOne group gets an existing treatment, for comparison.
Treatments tested
  • Home IOP telemonitoring with smart phone-based intervention
  • Standard care and smart phone-based intervention
Record updated
3 September 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults with newly diagnosed primary open-angle glaucoma and fairly good vision. It compares home eye pressure checks plus phone messages with phone messages alone.

Age
18 years or older
Sex
All sexes can join
Disease stage
Newly diagnosed primary open-angle glaucoma (POAG)
Earlier treatment
No previous eye surgery or corneal refractive surgery, except uncomplicated cataract removal

Main reasons for not taking part

  • Eye pressure above 35 mmHg
  • Dry eye syndrome
  • Only one eye with functional vision
  • Pathological myopia
  • Diabetic retinopathy or maculopathy

The registry criteria, word for word

Show all 12 criteriaShow less

Who can take part

  • Newly diagnosed primary open-angle glaucoma (POAG)
  • Best corrected visual acuity (VA) ≥20/40 for the included eye(s)

Who cannot take part

  • Previous intraocular surgery or corneal refractive surgery other than uncomplicated cataract extraction
  • Dry eye syndrome
  • Failure to complete the iCare Home certification procedure at the baseline visits
  • IOP >35 millimeters of mercury (mmHg)
  • Central corneal thickness <500μm or >600μm
  • Only one eye with functional vision
  • Inability to perform reliable visual field (VF)
  • Pathological myopia (eyes with axial length≥26mm with lacquer cracks and chorioretinal atrophy)
  • Suboptimal quality of optical coherence tomography (OCT) images (described below in RNFL imaging)
  • Diabetic retinopathy/maculopathy

Where in Hong Kong

  • HKU Eye CentreWong Chuk Hang, Hong KongContact: Christopher LeungTaking people

About the trial

What the trial wants to find out

The goal of this clinical trial is to conduct a study randomizing glaucoma patients to home intra-ocular pressure (IOP) telemonitoring combined with Smart phone-based intervention (Management Paradigm I) or Smart phone-based intervention alone (Management Paradigm II), with the objectives to compare (1) Goldmann applanation tonometry (GAT) intra-ocular pressure (IOP) measurements over the entire study period (primary outcome measure) and (2) the rates of Retinal nerve fiber layer (RNFL) thinning (secondary outcome measure) between the two Management Paradigms. We hypothesize that glaucoma patients randomized to Management Paradigm I will (1) attain lower levels of intra-ocular pressure (IOP), and (2) a slower rate of Retinal nerve fiber layer (RNFL) and ganglion cell inner plexiform layer (GCIPL) thinning compared with those randomized to Management Paradigm II because of having a more precise assessment of intra-ocular pressure (IOP) to guide intra-ocular pressure (IOP)- lowering therapy would be feasible in Management Paradigm I.

Read full original descriptionShow less

It aims to:

to compare (1) Goldmann applanation tonometry (GAT) intra-ocular pressure (IOP) measurements over the entire study period (primary outcome measure) and (2) the rates of Retinal Nerve Fiber Layer (RNFL) thinning (secondary outcome measure) between the two Management Paradigms.

Participants will asked to do,

* Management Paradigm I: will be provided with an iCare Home and instructed to measure and upload 6 intra-ocular pressure (IOP) measurements weekly (2 days a week, 1 measurement in the early morning (5 am to 9 am), 1 during the mid-day (12 pm to 4 pm) and 1 in the evening (7 pm to 11pm)) to a secure server via iCare CLINIC (the number of weekly intra-ocular pressure (IOP) measurements follows the number of weekly blood pressure measurements in the HyperLink study). The morning measurement will include two readings with the first obtained in the supine position before getting out of the bed and the second obtained in the upright position right after. Patients may take additional intra-ocular pressure (IOP) measurements in supine position if they wake up in bed from sleep, as well as other times of the day, but this is not mandatory. These additional intra-ocular pressure (IOP) measurements will not be included for treatment decisions during the study period. * Management paradigm II: Patients will be treated with a topical prostaglandin analogue after baseline intra-ocular pressure (IOP) measurements.

The 2 groups in the trial

  • Management Paradigm I: Home IOP telemonitoring with smart phone-based interventionExisting treatment, for comparison

    Before treatment initiation, patients perform 4 weeks of baseline home IOP measurements, then continue to obtain at least six IOP measurements per week (two readings in the early morning, and one each at mid-day and evening on two days per week) and upload readings via the iCare CLINIC cloud platform. Investigators review home IOP data every 4 weeks and adjust topical IOP-lowering therapy according to a predefined algorithm whenever fewer than 75% of home readings are below the target IOP based on disease severity. Every 4 weeks, patients receive smartphone text messages indicating whether the home-based target IOP has been achieved and reminding them about eye-drop adherence; patients report missed doses by text, and a nurse calls patients who do not reply or who submit fewer than 20 home IOP readings in 4 weeks.

    Treatment: Home IOP telemonitoring with smart phone-based intervention

  • Management paradigm II: Standard care and smart phone-based interventionExisting treatment, for comparison

    Topical IOP-lowering therapy is escalated according to the same predefined stepwise protocol used in Management Paradigm I when target IOP is not reached. No home IOP telemonitoring is used; treatment decisions rely on clinic-measured IOP and structural/functional assessments. Every 4 weeks, patients receive smartphone text messages indicating whether the target pressure has been attained based on the latest clinic Goldmann measurement and reminding them about eye-drop adherence; patients report missed doses by text, and clinic staff follow up by phone as needed.

    Treatment: Standard care and smart phone-based intervention

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

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Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
Impact of Home Intraocular Pressure Telemonitoring on Intraocular Pressure Control and Glaucoma Progression - A Randomized Control Trial
Plain-language title
Home eye pressure checks with a smartphone for people with glaucomaGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Record updated
3 September 2026