Intraocular pressure measurements using the TONOVET ® rebound tonometer: Influence of the probe‐cornea distance

2020 ◽  
Author(s):  
Blanche D. Rodrigues ◽  
Fabiano Montiani‐Ferreira ◽  
Mariza Bortolini ◽  
André T. Somma ◽  
András M. Komáromy ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Pressure Measurements ◽  
Rebound Tonometer

Agreement profiles for rebound and applanation tonometry in normal and glaucomatous children

2018 ◽  
Vol 29 (4) ◽  
pp. 379-385 ◽  
Author(s):  
Amanne Esmael ◽  
Yomna M Ismail ◽  
Abdelrahman M Elhusseiny ◽  
Alaa E Fayed ◽  
Hala M Elhilali
Keyword(s):  
Intraocular Pressure ◽  
Mean Difference ◽  
Congenital Glaucoma ◽  
Eye Drops ◽  
Pressure Measurements ◽  
Primary Congenital Glaucoma ◽  
Rebound Tonometer ◽  
Age Variations ◽  
Applanation Tonometer ◽  
Level Of Agreement

Objectives: To investigate agreement between intraocular pressure measurements by the rebound tonometer and handheld Perkins applanation tonometer in children with and without primary congenital glaucoma and test agreement with intraocular pressure and age variations. Materials and methods: A prospective non-interventional comparative study done on 223 eyes of 115 children, 161 normal eyes, and 62 eyes with primary congenital glaucoma. Intraocular pressure measurements were obtained in the upright position by rebound tonometer first, followed by installation of topical anesthetic eye drops (benoxinate), then measured by Perkins applanation tonometer. Results: For all eyes, mean difference between Perkins applanation tonometer and rebound tonometer was −0.59 ± 2.59 mmHg, p = 0.001. Regression analysis with (r) = 0.9, (r2) = 0.79, and p < 0.001. In primary congenital glaucoma: there was a mean difference of −.79 ± 2.82 (p = 0.032), a good correlation with (r) = 0.94, (r2) = 0.87%, and 95% level of agreement: –6.34 to +4.76. In normal eyes: mean difference was −.52 ± 2.5 (p = 0.01), correlation: (r) = 0.8, (r2) = 0.64, and p = 0.001. The 95% level of agreement −5.41 and +4.36 mmHg. In intraocular pressure ⩽ 15 mmHg: mean difference −0.89 ± 2.15 mmHg, 95% level of agreement between −5.1 and +3.32 mmHg, p < 0.001. In intraocular pressure >15 mmHg: mean difference was 0.04 ± 3.28 mmHg, 95% level of agreement −6.38 and +6.46 mmHg, p = 0.914. Conclusion: There is a good correlation between rebound tonometer and Perkins applanation tonometer in children with and without primary congenital glaucoma; however, rebound tonometer overestimates the intraocular pressure, and in intraocular pressure >15 mmHg there is less agreement between the two devices. Hence, in higher intraocular pressure measurement caution should be taken when interpreting rebound tonometer readings, and a confirmatory measurement using Perkins applanation tonometer is advised.

scholarly journals The influence of the tonometer position on canine intraocular pressure measurements using the Tonovet® rebound tonometer

2018 ◽  
Vol 8 (1) ◽  
pp. 68 ◽  
Author(s):  
Juliana Kravetz De Oliveira ◽  
Fabiano Montiani-Ferreira ◽  
David L. Williams
Keyword(s):  
Intraocular Pressure ◽  
Pressure Measurements ◽  
Rebound Tonometer

Effect of postural changes on intraocular pressure in patients with acute angle-closure glaucoma in Indian population

2020 ◽  
Vol 3 ◽  
pp. 2
Author(s):  
Sanjay Mishra ◽  
Ashok Kumar
Keyword(s):  
Intraocular Pressure ◽  
Acute Angle ◽  
Angle Closure Glaucoma ◽  
Angle Closure ◽  
Sitting Position ◽  
Rebound Tonometer ◽  
Antiglaucoma Medication ◽  
Primary Angle Closure Glaucoma ◽  
Postural Changes ◽  
Healthy Control

Objective: The objective of the study was to compare the posture-induced intraocular pressure (IOP) changes in primary angle-closure glaucoma (PACG) with or without glaucoma medications, and healthy control eyes with normal IOPs in Indian subjects. Materials and Methods: The IOP was measured in the sitting position and the supine position after 10, 20, and 30 min with a rebound tonometer. Results: Twenty-five patients with PACG and 30 controls with normal IOPs were studied. The IOP in the sitting position measured with the rebound tonometer was 13.8 + 3.2 mm Hg in eyes with PAC, and 12.9 + 2.9 mm Hg in eyes with normal IOPs. The IOP increased to 14.4 mm Hg, 16.8 mm Hg, and 18.9 mm Hg at 10 min, 20 min, and 30 min in PACG subjects. In normal age-matched controls, the IOP increased to 13.4 mm Hg, 14.9 mm Hg, and 17.8 mm Hg at 10 min, 20 min, and 30 min, respectively, but none of these differences were significant (P = 0.09; P = 0.08, P = 0.08). The mean postural IOP change from baseline was also not significant between the two groups. Only three patients were on single antiglaucoma medication with well-controlled IOP in the PACG group. Conclusions: Postural IOP changes are comparable among eyes with PACG with and without glaucoma medications, and control eyes.

Comparison of intraocular pressure in healthy brachycephalic and nonbrachycephalic cats using the Icare® TONOVET Plus rebound tonometer

2021 ◽  
Author(s):  
Kamolchanok Kerdchuchuen ◽  
Kingkarn Samathayanon ◽  
Pitchapa Phientong ◽  
Suprapha Chattraphirat ◽  
Orapun Jaturakan ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Rebound Tonometer
Sign in / Sign up

Export Citation Format

Share Document