Comparing eye pressure measurements using the TonoVera device and other tonometers
Official title: Comparison of Intraocular Pressure Measurement With the Novel TonoVera Device With Other Commonly Used Devices
Run by State University of New York at Buffalo · NCT05523622 · Data updated 2026-11-12
This study is testing how well the TonoVera device measures eye pressure compared to other common devices to help people with glaucoma.
Quick facts
| Study type | Interventional |
|---|---|
| Sex | All |
| Enrollment | 300 (estimated) |
| Sponsor | State University of New York at Buffalo Academic / other |
| Locations | 1 site (Buffalo, New York) |
| Status | Recruiting |
| Started | August 1, 2022 |
| Main results expected | December 31, 2027 |
| Study ends | December 31, 2027 |
| Registry record updated | May 6, 2026 |
| Trial ID | NCT05523622 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults aged 18 to 99 who are in good general health and can provide informed consent.
✕Probably not a fit
Patients with conditions that prevent accurate tonometry readings, such as significant corneal pathology or those unable to comply with study procedures, may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This study evaluates the accuracy of the TonoVera tonometer by comparing its intraocular pressure (IOP) measurements with those obtained from the Goldmann Applanation Tonometry and iCare devices. Participants will undergo multiple IOP measurements using each device on both eyes, along with assessments of central corneal thickness and corneal hysteresis. The goal is to determine how well the TonoVera performs relative to established methods in measuring eye pressure, which is crucial for glaucoma management.
Why it matters
Potential benefit: If successful, this study could lead to improved accuracy in measuring intraocular pressure, enhancing glaucoma diagnosis and management.
How similar studies have gone: Other studies have successfully compared tonometry devices, but the TonoVera is a novel device being evaluated in this context.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Ability to provide signed and dated informed consent form. Patients willing to comply with all study procedures and be available for the duration of the study. Male or female patients aged 18 to 99 Patients in good general health as evidenced by ability to come to their appointment on day of study. Exclusion Criteria: * Patients age less than 18 years Patients unable or unwilling to provide informed consent to participate in the study Patients for which an accurate tonometry reading cannot be performed. This may include those with blepharospasm (lid squeezers), nystagmus, extensive corneal pathology, or contact lens wearers who cannot remove their contact lens.Patients with significant scleral thinning Patients with a known allergy to proparacaine or fluorescein as these are used to anesthetize and allow measurement respectively of the eye when used with the Goldmann tonometer.
Where it's running
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Ross Eye Institute
Buffalo, New York, United States Recruiting
Study contacts
- Study coordinator: Sandra Sieminski, MD
- Email: smfernando17@gmail.com
- Phone: 716-408-6909
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.