Goldmann tonometer error correcting prism: clinical evaluation

Clinical Ophthalmology
Sean McCaffertyCorin Kew

Abstract

Clinically evaluate a modified applanating surface Goldmann tonometer prism designed to substantially negate errors due to patient variability in biomechanics. A modified Goldmann prism with a correcting applanation tonometry surface (CATS) was mathematically optimized to minimize the intraocular pressure (IOP) measurement error due to patient variability in corneal thickness, stiffness, curvature, and tear film adhesion force. A comparative clinical study of 109 eyes measured IOP with CATS and Goldmann prisms. The IOP measurement differences between the CATS and Goldmann prisms were correlated to corneal thickness, hysteresis, and curvature. The CATS tonometer prism in correcting for Goldmann central corneal thickness (CCT) error demonstrated a reduction to <±2 mmHg in 97% of a standard CCT population. This compares to only 54% with CCT error <±2 mmHg using the Goldmann prism. Equal reductions of ~50% in errors due to corneal rigidity and curvature were also demonstrated. The results validate the CATS prism's improved accuracy and expected reduced sensitivity to Goldmann errors without IOP bias as predicted by mathematical modeling. The CATS replacement for the Goldmann prism does not change Goldmann measurement technique or i...Continue Reading

Citations

Feb 15, 2019·Biomedical Engineering Online·Magdalena Jędzierowska, Robert Koprowski
Nov 30, 2019·European Journal of Ophthalmology·Lisa RammNaim Terai
Jan 6, 2018·BMC Ophthalmology·Sean McCaffertyEniko T Enikov
Apr 29, 2020·Scientific Reports·María IglesiasRicardo P Casaroli-Marano

❮ Previous
Next ❯

Software Mentioned

GAT

Related Concepts

Related Feeds

Biomechanics

Biomechanics examines the generation of internal forces within the body and investigates the effects and control of forces that act on or are produced on tissues. Here are the latest discoveries.

Related Papers

Translational Vision Science & Technology
Sean McCaffertyJim Schwiegerling
Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie
Mona PacheJens Funk
Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie
Teresio AvitabileMarine Castaing
© 2022 Meta ULC. All rights reserved