Accuracy of Handheld and Non-contact Tonometry

Accuracy of Handheld and Non-contact Tonometry in Clinical Practice

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05352906

Enrollment

300

Registered

2022-04-29

Start date

2022-04-20

Completion date

2023-01-30

Last updated

2022-04-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Glaucoma, Glaucoma, Suspect, Intraocular Pressure

Keywords

Glaucoma, Suspect, Tonometer, Air-puff

Brief summary

Monitoring the intraocular pressure (IOP) is one of the most important tests used in follow-up among glaucoma suspects and confirmed glaucomatous patients.

Detailed description

In tertiary hospitals, IOP screening is an important tool to confirm glaucomatous eyes. Inaccurate measurements may lead to missed diagnosis or false positive results that may affect patients' quality of life. There are many devices produced to measure IOP, the commonest one is Goldman contact tonometry, the aim of this study is to compare the results of new developed tonometers to the standard applanation tonometer.

Interventions

DIAGNOSTIC_TESTIntraocular pressure

Measurements of intraocular pressure in millimeter mercury (mmHg).

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

DIAGNOSTIC

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 80 Years

Healthy volunteers

Yes

Inclusion criteria

* All subjects seeking regular check-up in glaucoma clinic at banha university hospital. * Glaucoma suspects and glaucomatous patients that visit glaucoma clinic for regular IOP measurements.

Exclusion criteria

* Patients that will refuse to measure IOP again with other devices. * patients with previous corneal surgeries or scar that may alter the measurements of the tonometer s (as previous keratoplasty, trauma or opacities).

Design outcomes

Primary

Measure	Time frame	Description
Accuracy of air-puff tonometry	Immediately after goldman applanation tonometry test for each eye.	Comparing IOP measurements in (mmHg) between standard goldman applanation tonometry and air-puff non-contact tonometry.

Secondary

Measure	Time frame	Description
Accuracy of handheld tonometry	Immediately after goldman applanation tonometry test for each eye.	Comparing IOP measurements in (mmHg) between standard goldman applanation tonometry and handheld contact tonometry.

Countries

Egypt

Contacts

Primary ContactAhmed Abdelshafy, MD

ahmad4lg@gmail.com01222328766

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026