Goldmann tonometry tear film error and partial correction with a shaped applanation surface
| Autor: | Jim Schwiegerling, Sean Ashley, Sean McCafferty, Eniko T. Enikov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Intraocular pressure
medicine.medical_specialty bias genetic structures medicine.medical_treatment Glaucoma 03 medical and health sciences 0302 clinical medicine Cadaver Cornea Ophthalmology medicine applanation tear film Original Research business.industry IOP Clinical Ophthalmology Goldmann Adhesion medicine.disease error eye diseases 3. Good health Goldmann tonometry Artificial tears glaucoma medicine.anatomical_structure 030221 ophthalmology & optometry sense organs Prism tonometer business 030217 neurology & neurosurgery intraocular pressure |
| Zdroj: | Clinical Ophthalmology (Auckland, N.Z.) |
| ISSN: | 1177-5483 |
| DOI: | 10.2147/opth.s152492 |
| Popis: | Sean J McCafferty,1–4 Eniko T Enikov,5 Jim Schwiegerling,2,3 Sean M Ashley1,3 1Intuor Technologies, 2Department of Ophthalmology, University of Arizona College of Medicine, 3University of Arizona College of Optical Science, 4Arizona Eye Consultants, 5Department of Mechanical and Aerospace, University of Arizona College of Engineering, Tucson, AZ, USA Purpose: The aim of the study was to quantify the isolated tear film adhesion error in a Goldmann applanation tonometer (GAT) prism and in a correcting applanation tonometry surface (CATS) prism.Methods: The separation force of a tonometer prism adhered by a tear film to a simulated cornea was measured to quantify an isolated tear film adhesion force. Acrylic hemispheres (7.8mm radius) used as corneas were lathed over the apical 3.06mm diameter to simulate full applanation contact with the prism surface for both GAT and CATS prisms. Tear film separation measurements were completed with both an artificial tear and fluorescein solutions as a fluid bridge. The applanation mire thicknesses were measured and correlated with the tear film separation measurements. Human cadaver eyes were used to validate simulated cornea tear film separation measurement differences between the GAT and CATS prisms.Results: The CATS prism tear film adhesion error (2.74±0.21mmHg) was significantly less than the GAT prism (4.57±0.18mmHg, p |
| Databáze: | OpenAIRE |
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