GAT-DCT-Discordance Due to Corneal Properties

Influence of Discordant Intraocular Eye Pressure Readings Taken by Dynamic Contour Tonometry and Goldmann Applanation Tonometry

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01474070

Enrollment

112

Registered

2011-11-17

Start date

2011-11-30

Completion date

2016-10-31

Last updated

2016-10-18

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

Conditions

Glaucoma

Keywords

Glaucoma, Goldmann Tonometry, Dynamic Contour Tonometry

Brief summary

IOP is measured with two devices (Dynamic Contour Tonometry (DCT) and Goldmann applanation tonometry (GAT)).

Detailed description

DCT reading will be compared to a corrected GAT reading by the formula of Elsheikh, Alhasso and Pye. * Trial with medical device

Interventions

DEVICEIntraocular Pressure Measurement

Intraocular pressure is measured with GAT and with DCT

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

* clinical diagnosis of glaucoma

Exclusion criteria

* other optic neuropathy other then glaucoma * age\<18 * corneal surgery * use of contact lenses

Design outcomes

Primary

Measure	Time frame	Description
Intraocular pressure (IOP)	IOP is measured at the only study visit	IOP is measured with goldman-applanation tonometer and dynamic-contour-tonometer at the only study visit (V0)

Secondary

Measure	Time frame	Description
Demographical and clinical data	study visit V0	Age, axial length of the eye, central corneal thickness

Countries

Switzerland

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 26, 2026