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[Correlation between Goldmann and non-contact tonometry based on corneal thickness].
G Schepens1, N Urier, A Bechetoille
1Service d'Ophtalmologie, Cliniques Universitaires Saint-Luc, U.C.L., Bruxelles, Belgique.
Bulletin De La Societe Belge D'Ophtalmologie
|May 10, 2001
Summary
This study found no correlation between central cornea thickness and intraocular pressure measurement differences between Goldmann and Non-Contact tonometers. Non-contact tonometer precision is not affected by corneal thickness.
Area of Science:
- Ophthalmology
- Biomedical Engineering
Background:
- Intraocular pressure (IOP) measurement is crucial for glaucoma diagnosis and management.
- Central cornea thickness (CCT) is known to influence IOP readings.
- Comparing Goldmann tonometry (GAT) and Non-Contact tonometry (NCT) is important for clinical practice.
Purpose of the Study:
- To investigate the relationship between central cornea thickness (CCT) and the agreement between Goldmann tonometer (GT) and Non-Contact tonometer (NCT) measurements.
- To assess if CCT influences the relative precision of NCT compared to GT.
Main Methods:
- A transversal study involving 136 eyes from 73 patients.
- Measurement of intraocular pressure using both Goldmann tonometer and Non-Contact tonometer.
- Measurement of central cornea thickness for all participants.
Main Results:
- Statistical analysis did not reveal a significant correlation between variations in corneal thickness and the difference in IOP measurements obtained from GT and NCT.
- The relative precision of the Non-Contact tonometer, when compared to the Goldmann tonometer, did not appear to be influenced by the central cornea thickness.
Conclusions:
- Central cornea thickness does not appear to be a significant factor affecting the agreement or precision differences between Goldmann and Non-Contact tonometers.
- These findings suggest that NCT may offer reliable IOP measurements across a range of corneal thicknesses, similar to GT.