Non-invasive ocular rigidity measurement: a differential tonometry approach

Title:

Non-invasive ocular rigidity measurement: a differential tonometry approach
Non-invasive ocular rigidity measurement: a differential tonometry approach

Creator:

Detorakis, Efstathios T., Tsaglioti, Emmanuela, and Kymionis, George

Contributor:

Detorakis, Efstathios T., Tsaglioti, Emmanuela, and Kymionis, George

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:bmc16011071-587a78dc-fbf9-425a-86a6-f39bfcf27c95
uuid:bmc16011071-587a78dc-fbf9-425a-86a6-f39bfcf27c95
local:bmc16011071
http://actamedica.lfhk.cuni.cz/
doi: 10.14712/18059694.2015.99
local: bmc16011071

Subject:

algoritmy, katarakta--ultrasonografie, studie proveditelnosti, ženské pohlaví, lidé, nitrooční tlak, mužské pohlaví, reprodukovatelnost výsledků, and tonometrie oční--metody

Type:

model:article, article, Text, časopisecké články, and TEXT

Format:

print, text, and regular print

Description:

PURPOSE: 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. METHODS: 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). RESULTS: 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. CONCLUSIONS: 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. and E. T. Detorakis, E. Tsaglioti, G. Kymionis

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Relation:

Acta medica (Hradec Králové) Universitas Carolina, Facultas Medica Hradec Králové--MED00010947

Source:

Acta medica (Hradec Králové) | 2015 Volume:58 | Number:3

Harvested from:

CDK

Metadata only:

false

Date:

2015