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Related Experiment Videos

[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
PubMed
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.

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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.

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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.