The Relationship between Diurnal Variations in Intraocular Pressure Measurements and Central Corneal Thickness and Corneal Hysteresis

2009 ◽  
Vol 50 (9) ◽  
pp. 4229 ◽  
Author(s):  
Aachal Kotecha ◽  
David P. Crabb ◽  
Alexander Spratt ◽  
David F. Garway-Heath
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Diurnal Variations ◽  
Corneal Hysteresis ◽  
Pressure Measurements ◽  
The Relationship

Relationship between novel intraocular pressure measurement from Corvis ST and central corneal thickness and corneal hysteresis

2019 ◽  
Vol 104 (4) ◽  
pp. 563-568 ◽  
Author(s):  
Masato Matsuura ◽  
Hiroshi Murata ◽  
Yuri Fujino ◽  
Mieko Yanagisawa ◽  
Yoshitaka Nakao ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Linear Regression Analysis ◽  
Corneal Thickness ◽  
Biomechanical Properties ◽  
Applanation Tonometry ◽  
Corneal Hysteresis ◽  
Corneal Resistance Factor ◽  
Corvis St ◽  
The Relationship

AimsCorvis ST (CST) yields biomechanical corrected IOP (bIOP) which is purported to be less dependent on biomechanical properties. In our accompanied paper, it was suggested that the repeatability of bIOP is high. The purpose of the current study was to assess the relationship between intraocular pressure (IOP) measured with CST and central corneal thickness (CCT) and corneal hysteresis (CH), in comparison with IOP measured with Goldmann applanation tonometry (GAT) and the ocular response analyzer (ORA).MethodsA total of 141 eyes from 141 subjects (35 healthy eyes and 106 glaucomatous eyes) underwent IOP measurements with GAT, CST and ORA. The relationships between IOP measurements (ORA-IOPg, ORA-IOPcc, CST-bIOP and GAT IOP) and biomechanical properties (CCT, CH and corneal resistance factor (CRF)) were analysed using the linear regression analysis.ResultsIOPg, IOPcc and GAT IOP were significantly associated with CCT (p<0.001), whereas bIOP was not significantly associated with CCT (p=0.19). IOPg, bIOP and GAT IOP were significantly associated with CH (IOPg: p<0.001; bIOP: p<0.001; GAT IOP: p=0.0054), whereas IOPcc was not significantly associated with CH (p=0.18). All of IOP records were associated with CRF (p<0.001).ConclusionThe bIOP measurement from CST is independent from CCT, but dependent on CH and CRF.

scholarly journals Pediatric intraocular pressure measurements: Tonometers, central corneal thickness, and anesthesia

2019 ◽  
Vol 64 (6) ◽  
pp. 810-825 ◽  
Author(s):  
Mahmoud A. Fayed ◽  
Teresa C. Chen
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Pressure Measurements

1987 The Relationship between Central Corneal Thickness, Tonographic Outflow Facility, and Intraocular Pressure

SciVee ◽  
2012 ◽  
Author(s):  
Pouya Alaghband ◽  
Evgenia Kanonidou ◽  
Laura Beltran-Agullo ◽  
Darryl R. Overby ◽  
K Sheng Lim
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Outflow Facility ◽  
The Relationship

Intraocular pressure measurements in diabetes mellitus

2019 ◽  
Vol 30 (6) ◽  
pp. 1432-1439 ◽  
Author(s):  
Lisa Ramm ◽  
Robert Herber ◽  
Eberhard Spoerl ◽  
Lutz E Pillunat ◽  
Naim Terai
Keyword(s):  
Diabetes Mellitus ◽  
Intraocular Pressure ◽  
Healthy Subjects ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Applanation Tonometry ◽  
Goldmann Applanation Tonometry ◽  
Ocular Response Analyzer ◽  
Pressure Measurements ◽  
Corvis St

Purpose: To investigate the impact of diabetes mellitus–induced changes on intraocular pressure measurements using Goldmann applanation tonometry, Ocular Response Analyzer, and Corvis ST. Methods: Measurements were done using Goldmann applanation tonometry, Ocular Response Analyzer, and Corvis ST in 69 diabetic patients. Biomechanical-corrected intraocular pressure values by Ocular Response Analyzer (IOPcc) and Corvis ST (bIOP) were used. In addition, biometry and tomography were performed and information on diabetes mellitus specific factors was collected. Results were compared to an age-matched group of 68 healthy subjects. Results: In diabetes mellitus, Goldmann applanation tonometry intraocular pressure (P = 0.193) and central corneal thickness (P = 0.184) were slightly increased. Also, IOPcc (P = 0.075) and bIOP (P = 0.542) showed no significant group difference. In both groups, IOPcc was higher than Goldmann applanation tonometry intraocular pressure (P = 0.002, P < 0.001), while bIOP was nearly equal to Goldmann applanation tonometry intraocular pressure (P = 0.795, P = 0.323). Central corneal thickness showed a tendency to higher values in poorly controlled than in controlled diabetes mellitus (P = 0.059). Goldmann applanation tonometry intraocular pressure correlated to central corneal thickness, while IOPcc and bIOP were independent from central corneal thickness in both groups. All intraocular pressure values showed significant associations to corneal biomechanical parameters. Only in diabetes mellitus, bIOP was correlated to Pachy slope (P = 0.023). Conclusion: In diabetes mellitus, Goldmann applanation tonometry intraocular pressure was slightly, but not significantly, increased, which might be caused by a higher central corneal thickness and changes in corneal biomechanical properties. However, intraocular pressure values measured by Ocular Response Analyzer and Corvis ST were not significantly different between diabetes mellitus patients and healthy subjects. The bIOP showed a higher agreement with Goldmann applanation tonometry than IOPcc and was independent from central corneal thickness.

scholarly journals The Effect of Corneal Thickness, Densitometry and Curvature on Intraocular Pressure Measurements Obtained by Applanation, Rebound and Dynamic Contour Tonometry

Vision ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 45
Author(s):  
Marco Antonio de Castro Olyntho Junior ◽  
Lucas Bertazzi Augusto ◽  
Carolina P. B. Gracitelli ◽  
Andrew J. Tatham
Keyword(s):  
Intraocular Pressure ◽  
Prospective Study ◽  
Corneal Thickness ◽  
Applanation Tonometry ◽  
Corneal Astigmatism ◽  
Dynamic Contour Tonometry ◽  
Pressure Measurements ◽  
Cross Sectional ◽  
Corneal Densitometry ◽  
The Relationship

Evaluate the effect of corneal thickness, densitometry and curvature on intraocular pressure (IOP) measurements obtained by Goldmann applanation tonometry (GAT), non-contact tonometry (NCT), rebound tonometry (RT), and dynamic contour tonometry (DCT). A cross-sectional prospective study involving 40 participants was performed. Corneal measurements were obtained using Pentacam (Oculus GMbH, Wetzlar, Germany), densitometry was measured at annuli of 0–2, 2–6, 6–10 and 10–12 mm. The relationship between corneal thickness (central, 4 and 6 mm), corneal astigmatism and corneal densitometry and IOP was examined. There was a significant relationship between corneal thickness (central, 4 and 6 mm) and GAT180, GAT90, RT, and NCT (P < 0.001 for all comparisons) but not for DCT. Higher corneal densitometry (6–10 mm and 10–12 mm zones) was associated with higher IOP from GAT180 and GAT90, and higher densitometry in the 6–10 mm zone correlated with higher IOP from NCT, however corneal densitometry increased with age. Accounting for age, the relationship between corneal densitometry and IOP measurements was not significant. In eyes with greater corneal astigmatism there was a greater difference between GAT90 and GAT180 measurements. IOP measurements may be affected by corneal thickness, densitometry and curvature. DCT was less affected by properties of the cornea compared to other devices.

scholarly journals Combining corneal hysteresis with central corneal thickness and intraocular pressure for glaucoma risk assessment

Eye ◽  
2012 ◽  
Vol 26 (10) ◽  
pp. 1349-1356 ◽  
Author(s):  
D Pensyl ◽  
M Sullivan-Mee ◽  
M Torres-Monte ◽  
K Halverson ◽  
C Qualls
Keyword(s):  
Risk Assessment ◽  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Corneal Hysteresis

Evaluation of the relationship of corneal biomechanical metrics with physical intraocular pressure and central corneal thickness in ex vivo rabbit eye globes

2015 ◽  
Vol 137 ◽  
pp. 11-17 ◽  
Author(s):  
FangJun Bao ◽  
ManLi Deng ◽  
QinMei Wang ◽  
JinHai Huang ◽  
Jing Yang ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Ex Vivo ◽  
Corneal Thickness ◽  
Rabbit Eye ◽  
Relationship Of ◽  
The Relationship

scholarly journals The Heritability of Glaucoma-Related Traits Corneal Hysteresis, Central Corneal Thickness, Intraocular Pressure, and Choroidal Blood Flow Pulsatility

PLoS ONE ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. e55573 ◽  
Author(s):  
Ellen E. Freeman ◽  
Marie-Hélène Roy-Gagnon ◽  
Denise Descovich ◽  
Hugues Massé ◽  
Mark R. Lesk
Keyword(s):  
Blood Flow ◽  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Corneal Hysteresis ◽  
Choroidal Blood Flow ◽  
Flow Pulsatility

The Relationship Among Race, Iris Color, Central Corneal Thickness, and Intraocular Pressure

2006 ◽  
Vol 83 (7) ◽  
pp. 512-515 ◽  
Author(s):  
LEO SEMES ◽  
ADAM SHAIKH ◽  
GERALD MCGWIN ◽  
JIMMY D. BARTLETT
Keyword(s):  
Intraocular Pressure ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Iris Color ◽  
The Relationship
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