Non-Contact Air Tonometry (Topcon CT-1®) Versus Goldmann

University of Zurich58 enrolled

Overview

In this prospective device comparison study with 58 healthy eyes, the Topcon CT-1® showed statistically significant elevated intraocular pressure measurements compared to the gold standard Goldmann application tonometry.

Introduction: Intraocular pressure (IOP) measurement is crucial in glaucoma diagnosis and treatment. We compared a non-contact air tonometer (Topcon CT-1®) with the gold standard Goldmann Applikation tonometer (GAT). Methods: In this prospective, mono centric device comparison study, only healthy eyes were enrolled. IOP was measured three times with the Topcon CT-1® followed by three times GAT. Mean IOP was calculated and compared with a paired t-test, a linear regression and a Bland-Altman analysis.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Glaucoma

Interventions

Intraocular pressure measurementDEVICE

Pressure tip or air puff is applied on eye

Eligibility

Sex: ALLMin age: 18 YearsMax age: 99 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: Healthy volunteers who agreed to be included in the study and were able to comply with the measurement procedures Exclusion criteria were cor-neal abnormalities (such as oedema, scars or dystrophies, astigmatism,hyperopia or myopia \> 3 dioptres), a history of ocular surgery or recent(\<47 weeks) ocular disorder.

Locations (1)

Augenpraxis Centerpassage

Wettingen, Canton of Aargau, Switzerland

Outcomes

Primary Outcomes

Comparison of GAT with air tonometry Topcon CT1

Difference in mmHg between these two devices

Time frame: 7 months

Data from ClinicalTrials.gov

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