Non-Invasive Ocular Rigidity Measurement: A Differential Tonometry Approach.

Details

Serval ID
serval:BIB_6FA832A3CF02
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Non-Invasive Ocular Rigidity Measurement: A Differential Tonometry Approach.
Journal
Acta medica
Author(s)
Detorakis E.T., Tsaglioti E., Kymionis G.
ISSN
1211-4286 (Print)
ISSN-L
1211-4286
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
58
Number
3
Pages
92-97
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Taking into account the fact that Goldmann applanation tonometry (GAT) geometrically deforms the corneal apex and displaces volume from the anterior segment whereas Dynamic Contour Tonometry (DCT) does not, we aimed at developing an algorithm for the calculation of ocular rigidity (OR) based on the differences in pressure and volume between deformed and non-deformed status according to the general Friedenwald principle of differential tonometry.
To avoid deviations of GAT IOP from true IOP in eyes with corneas different from the "calibration cornea" we applied the previously described Orssengo-Pye algorithm to calculate an error coefficient "C/B". To test the feasibility of the proposed model, we calculated the OR coefficient (r) in 17 cataract surgery candidates (9 males and 8 females).
The calculated r according to our model (mean ± SD, range) was 0.0174 ± 0.010 (0.0123-0.022) mmHg/μL. A negative statistically significant correlation between axial length and r was detected whereas correlations between r and other biometric parameters examined were statistically not significant.
The proposed method may prove a valid non-invasive tool for the measurement method of OR, which could help in introducing OR in the decision-making of the routine clinical practice.
Keywords
Algorithms, Cataract/diagnostic imaging, Feasibility Studies, Female, Humans, Intraocular Pressure, Male, Reproducibility of Results, Tonometry, Ocular/methods, Ultrasonography, Cornea, Sclera
Pubmed
Open Access
Yes
Create date
30/09/2019 16:00
Last modification date
06/10/2019 5:26
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