Rebound Tonometer Compared With Goldmann Tonometer in Normal and Pathologic Corneas

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.

Download Full-text

Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

Journal of Ophthalmology ◽

10.1155/2019/1964107 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Mahmoud Rateb ◽

Mahmoud Abdel-Radi ◽

Zeiad Eldaly ◽

Mohamed Nagy Elmohamady ◽

Asaad Noor El Din

Keyword(s):

Central Corneal Thickness ◽

Pearson Correlation ◽

Corneal Thickness ◽

Altman Analysis ◽

Bland Altman Analysis ◽

Rebound Tonometer ◽

Goldmann Applanation Tonometer ◽

Significant Difference ◽

Applanation Tonometer ◽

Icare Rebound Tonometer

Purpose. To evaluate the different IOP readings by Goldmann applanation tonometer (GAT), ICare rebound tonometer, and Tono-Pen in keratoconus patients after MyoRing implantation. To assess the influence of central corneal thickness (CCT) and thinnest corneal location (TCL) on IOP measurements by different tonometers. Setting. Prospective observational study was conducted in two private centers in Egypt from February 2015 to November 2016. Methods. Seventeen eyes of 10 patients suffering from keratoconus and who underwent MyoRing implantation were recruited. All subjects underwent GAT, ICare, and Tono-Pen IOP measurements in random order. Central corneal thickness and thinnest corneal location were assessed by Pentacam. Difference in mean in IOP readings was assessed by T-test. Correlation between each pair of devices was evaluated by Pearson correlation coefficient. The Bland–Altman analysis was used to assess intertonometer agreement. Results. Seventeen eyes (10 patients) were evaluated. The mean IOP reading was 13.9 ± 3.68, 12.41 ± 2.87, and 14.29 ± 1.31 mmHg in GAT, ICare, and Tono-Pen group, respectively. There was a significant difference between IOP readings by GAT/ICare and Tono-Pen/ICare (p value: 0.032 and 0.002, respectively) with no significant difference between GAT/Tono-Pen (p value: 0.554). Mean difference in IOP measurements between GAT/ICare was 1.49 ± 2.61 mmHg, Tono-Pen/ICare was 1.89 ± 2.15 mmHg, and GAT/Tono-Pen was −0.39 ± 2.59 mmHg. There was no significant correlation between the difference in IOP readings among any pair of devices and CCC or TCL. The Bland–Altman analysis showed a reasonable agreement between any pair of tonometers.

Download Full-text

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

Veterinary Ophthalmology ◽

10.1111/vop.12929 ◽

2021 ◽

Author(s):

Kamolchanok Kerdchuchuen ◽

Kingkarn Samathayanon ◽

Pitchapa Phientong ◽

Suprapha Chattraphirat ◽

Orapun Jaturakan ◽

...

Keyword(s):

Intraocular Pressure ◽

Rebound Tonometer

Download Full-text

The Validity of a New Noncontact Tonometer and Its Comparison with the Goldmann Tonometer

Optometry and Vision Science ◽

10.1097/01.opx.0000141796.95597.43 ◽

2004 ◽

Vol 81 (8) ◽

pp. 601-605 ◽

Cited By ~ 18

Author(s):

ANDREW K. C. LAM ◽

RUFINA CHAN ◽

CHIN-HANG LAM

Keyword(s):

Noncontact Tonometer ◽

Goldmann Tonometer

Download Full-text

Assessment of intraocular pressure in chinchillas of different age groups using rebound tonometry

Ciência Rural ◽

10.1590/0103-8478cr20151206 ◽

2016 ◽

Vol 46 (8) ◽

pp. 1466-1471 ◽

Cited By ~ 1

Author(s):

Flor Diana Yokoay Claros Chacaltana ◽

João Antonio Tadeu Pigatto ◽

Ione Terezinha Denardin

Keyword(s):

Intraocular Pressure ◽

Age Groups ◽

Time Of Day ◽

Age Group ◽

Group Iii ◽

Rebound Tonometer ◽

Indirect Ophthalmoscopy ◽

Group I ◽

Schirmer Tear Test ◽

The Mean

ABSTRACT: The aim of this research was to measure the intraocular pressure (IOP) of normal chinchilla eyes using the rebound tonometer. A further aim was to assess whether there were differences in the values of intraocular pressure in relation to animals age, gender and time of day. Thirty-six chinchillas were divided into three groups of 12 chinchillas each, by age: Group I (2-6-month-old), Group II (20 and 34 months) and Group III (37 and 135 months). Ophthalmic examination was performed previously by Schirmer tear test, slit lamp biomicroscopy, indirect ophthalmoscopy and fluorescein test in all chinchillas. Three measurements of intraocular pressure were assessed on the same day (7, 12 and 19h). Tonometry was performed on both eyes using the rebound tonometer after calibration in "p" mode. Statistical analysis was performed with SigmaPlot for Windows. The mean IOP for groups I, II and III were 2.47±0.581mmHg, 2.47±0.581mmHg and 2.51±0.531mmHg, respectively. No significant differences were reported between age and IOP and no significant differences were reported between the time of day and IOP. The IOP in chinchillas did not differ significantly between genders or ages of the animals, and did not change with time of day.

Download Full-text