Intra-observer and Inter-observer Variability With Dynamic Contour Tonometry.

Status

Withdrawn

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00818233

Enrollment

Registered

2009-01-07

Start date

2009-01-31

Completion date

Unknown

Last updated

2016-05-13

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

Conditions

Intraocular Pressure

Keywords

dynamic contour tonometry, variability, pulse amplitude, Ocular pulse amplitude

Brief summary

The aim of the protocol is to document intra-observer and inter-observer variability with dynamic contour tonometry, and will also test the theory that pulse amplitude, as measured by dynamic contour tonometry, is correlated with the difference in systolic and diastolic blood pressures.

Interventions

DEVICEDynamic contour tonometry

Observe variability of measurements by dynamic contour tonometry

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Normal, healthy eyes * Minimal to moderate refractive error * Willingness to participate in the study

Exclusion criteria

* Diagnosis of any type of glaucoma * Any prior ocular surgery * Any prior ocular trauma * Any known anterior segment pathology

Design outcomes

Primary

Measure	Time frame
The variability of intraocular pressure measurements using dynamic contour tonometry	Same day

Secondary

Measure	Time frame
Observe how pulse amplitude, as measured by dynamic contour tonometry, correlates with the difference in systolic and diastolic blood pressures	Same day

Countries

United States

Outcome results

None listed

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