NCT04024293Recruiting
Intraocular Pressure Measured by a Novel Sensing Contact Lens Versus Tonometry
A Prospective Single Center Open Label Study Assessing Intraocular Pressure Measurements Using a Novel Sensing Contact Lens-based Device as Compared to Standard Tonometry, in Open Angle Glaucoma and Ocular Hypertensive Patients
Source: ClinicalTrials.gov · Last updated 30 Apr 2026
Brief summary (registry, in English)
While elevated intraocular pressure (IOP) is no longer part of the definition of glaucoma it remains the sole proven modifiable risk factor for the onset and progression of glaucoma. IOP is known to vary with the time of day as well as with daily activities. The importance of the nycthemeral IOP pattern for successful management of glaucoma has been well documented, especially for patients who experience visual loss despite apparently normal and/or controlled IOP during office hours. The current way of assessing nycthemeral IOP fluctuation is to perform repeated discrete tonometry measurements, once per hour in the best cases. Since its development in the 50s, Goldmann applanation tonometry (GAT) has remained the gold standard method for measuring IOP, despite its limitations. However, tonometry may be an imperfect method for measuring changes in IOP because it allows only snapshot and non-continuous measurements, it is not physiologic and disturbs the sleep architecture. There have been many efforts in the past decades to search for an ambulatory and frequent method to monitor IOP for 24 hours. In this context, Sensimed AG has recently developed a sensing contact lens-based device intended to measure IOP over 24 hours, the Goldfish (GF). First-in-man data obtained with this device showed agreements between IOP measured by GF and values obtained by standard tonometry in the same eye, comparable to literature results for routinely used tonometry devices. However, this pilot study included 9 subjects only with improvable safety, tolerability and efficacy profiles. The main goal of this study is to assess IOP measurements with the GF and compare the values with those obtained by standard tonometry in patients with open angle glaucoma (OAG) and ocular hypertension (OHT).
- Status (registry)
- Recruiting
- Study type
- Interventional
- Enrollment
- 12 (estimated)
- First submitted
- 16 Jul 2019
- Start date
- 1 Oct 2025
- Primary completion date
- 31 May 2026
- Lead sponsor
- Sensimed AG
- Diseases
- Glaucoma, High blood pressure
- NCT number
- NCT04024293
What you commit to
- Study type: Interventional
- Planned participants: 12
- From 1 Oct 2025 to the primary completion date, 31 May 2026
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Previous glaucoma, cataract or refractive laser/surgery
- Participation in another study with investigational drug within the 30 days preceding and during the present study,
Other illness
- Insufficiency of lacrimal secretion
- Subjects with allergy to corneal anesthetic
- Subjects with history of cardiac failure, treated cardiopathy or renal failure
- Subjects with known cognitive disorders
- Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. of the participant,
Other
- Ocular pathology (other than glaucoma or OHT)
- Corneal or conjunctival abnormality, precluding contact lens adaptation
- Subjects with contraindications for silicone contact lens wear
- Subjects with contraindications for Diamox or Latanoprost or Timolol
- Skin irritations, skin eczema or other indications against the wearing of adhesive patches
- Subjects unable or unwilling to comply with the study procedures
- Subjects lacking the capacity to consent (vulnerable persons)
- Enrolment of the investigator, his/her family members, employees and other dependent persons.
Who the study is looking for
- Informed Consent
- A clinical diagnosis of primary open angle glaucoma (POAG), including normal tension glaucoma (NTG), for OAG patients
- A clinical diagnosis of OHT, for OHT patients
- For all patients:
- Open angles on gonioscopy Aged ≥ 18 years, either gender Both central corneal radii (CCR) between 7.3mm (46.23D) and 8.05mm (41.93D), with a maximum difference of 2D between the 2 radii in the study eye Central corneal thickness (CCT) between 490µm and 600µm in the study eye
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Clinique Montchoisi Coordinator of this site? Confirm its status | Lausanne | Switzerland | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.