| Goldmann applanation tonometry - not as good as gold. | |
| | |
MedLine Citation:
|
PMID: 20882940 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
A thesis that linear mechanics does not apply to the analysis of cornea load during Goldmann applanation tonometry measurement and that the concept of surface tension in the lacrimal fluid is an ineffective attempt at circumventing the associated problems is put forward. The fundamental problem emerging during numerically simulated measurement of pressure on the eyeball, whose dimensions are considered to be calibrated, stems from the fact that the flattening of the cornea at the nominal intraocular pressure leads to a critical state in which the shell loses stability. The consequences are far-reaching. The Goldmann tonometer performs well at low intraocular pressure, but above the nominal pressure its readings are always understated. The cause of the error is not the tonometer itself (its readings can be even very accurate). It is shell "solution" called Imbert-Fick law which is faulty. |
| | |
Authors:
|
Wiesław Sródka |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Acta of bioengineering and biomechanics / Wrocław University of Technology Volume: 12 ISSN: 1509-409X ISO Abbreviation: Acta Bioeng Biomech Publication Date: 2010 |
Date Detail:
|
Created Date: 2010-10-01 Completed Date: 2010-12-21 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101194794 Medline TA: Acta Bioeng Biomech Country: Poland |
Other Details:
|
Languages: eng Pagination: 39-47 Citation Subset: IM |
Affiliation:
|
Deformable Body Mechanics Faculty Unit, Wrocław University of Technology, Poland. wieslaw.srodka@pwr.wroc.pl |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Artifacts* Computer Simulation Cornea / physiology* Diagnosis, Computer-Assisted / methods* Humans Intraocular Pressure / physiology* Models, Biological* Reproducibility of Results Sensitivity and Specificity Tonometry, Ocular / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Biomechanics of the brain for computer-integrated surgery.
Next Document: On some properties of bone functional adaptation phenomenon useful in mechanical design.