Effect of Body Position on Intraocular Pressure Measured by Rebound Tonometer in Healthy Children

Tonometry is one of the basic diagnostic tests used for the diagnosis of glaucoma and uveitis in veterinary ophthalmology. The Icare® Rebound Tonometer which is a new tonometric device has been shown to be useful in a wide range of species. Eyes (n = 48) of 24 Simmental and Montafon calves with a mean age of 7.5 weeks (2–16 weeks), male and female, were subjected to intraocular pressure (IOP) measurement using the Icare® Rebound Tonometer with calves standing and in lateral recumbency. The mean IOP was measured as 9.02 ± 2.38 mmHg in the right eye and 9.08 ± 2.55 mmHg in the left eye. No age-related change was found in intraocular pressure of the calves between 2 and 16 weeks of age. No difference in IOP values was observed between Simmental and Montafon calves. Body position had no effect on IOP in calves. The Icare® Rebound Tonometer was shown to be a suitable diagnostic device for IOP measurement in calves.

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Home assessment of diurnal intraocular pressure in healthy children using the Icare rebound tonometer

Journal of American Association for Pediatric Ophthalmology and Strabismus ◽

10.1016/j.jaapos.2011.10.005 ◽

2012 ◽

Vol 16 (1) ◽

pp. 58-60 ◽

Cited By ~ 11

Author(s):

Ya-Chuan Hsiao ◽

Jacqueline R. Dzau ◽

Meghan S. Flemmons ◽

Sanjay Asrani ◽

Sarah Jones ◽

...

Keyword(s):

Intraocular Pressure ◽

Healthy Children ◽

Rebound Tonometer ◽

Icare Rebound Tonometer

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Evaluation of the Effect of Body Position on Intraocular Pressure Measured with Rebound Tonometer

Turkish Journal of Ophthalmology ◽

10.4274/tjo.galenos.2018.90359 ◽

2019 ◽

Vol 49 (1) ◽

pp. 6-9

Author(s):

Hüseyin Mayalı ◽

Beyza Tekin ◽

Özcan Rasim Kayıkçıoğlu ◽

Emin Kurt ◽

Süleyman Sami İlker

Keyword(s):

Intraocular Pressure ◽

Body Position ◽

Rebound Tonometer

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

Latin American Journal of Ophthalmology ◽

10.25259/lajo_18_2019 ◽

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.

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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

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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.

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Influence of body position on the intraocular pressure of normal and glaucomatous eyes

Survey of Ophthalmology ◽

10.1016/0039-6257(76)90063-1 ◽

1976 ◽

Vol 21 (1) ◽

pp. 78

Author(s):

Saul Sugar

Keyword(s):

Intraocular Pressure ◽

Body Position

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Analysis of reproducibility, evaluation, and preference of the new iC100 rebound tonometer versus iCare PRO and Perkins portable applanation tonometry

European Journal of Ophthalmology ◽

10.1177/1120672119878017 ◽

2019 ◽

Vol 30 (6) ◽

pp. 1349-1355 ◽

Cited By ~ 1

Author(s):

Mercedes Molero-Senosiaín ◽

Laura Morales-Fernández ◽

Federico Saenz-Francés ◽

Julian García-Feijoo ◽

Jose María Martínez-de-la-Casa

Keyword(s):

Intraocular Pressure ◽

Visual Analogue Scale ◽

Analogue Scale ◽

Normal Subjects ◽

Applanation Tonometry ◽

Rebound Tonometer ◽

The Mean ◽

The Difference ◽

The Comparative Study ◽

Mean Time

Objectives: To analyze the reproducibility of the new iC100 rebound tonometer, to compare its results with the applanation tonometry and iCare PRO and to evaluate the preference between them. Materials and methods: For the study of reproducibility, 15 eyes of 15 healthy Caucasian subjects were included. Three measurements were taken each day in three separate sessions. For the comparative study, 150 eyes of 150 Caucasian subjects were included (75 normal subjects and 75 patients with glaucoma). Three consecutive measurements were collected with each tonometer, randomizing the order of use. The discomfort caused by each tonometer was evaluated using the visual analogue scale. Results: No statistically significant differences were detected between sessions. In the comparison between tonometers, the measurements with iC100 were statistically lower than those of Perkins (−1.35 ± 0.417, p = 0.004) and that iCare PRO (−1.41 ± 0.417, p = 0.002). The difference between PRO and Perkins was not statistically significant ( p = 0.990). The mean time of measurement (in seconds) with iC100 was significantly lower than with Perkins (6.74 ± 1.46 vs 15.53 ± 2.01, p < 0.001) and that PRO (6.74 ± 1.46 vs 11.53 ± 1.85, p < 0.001). Visual analogue scale score with iC100 was lower than Perkins (1.33 ± 0.99 vs 1.73 ± 1.10, p < 0.05). In total, 61.7% preferred iC100 against Perkins. Conclusion: The reproducibility of this instrument has been proven good. iC100 underestimates intraocular pressure compared to applanation tonometry at normal values and tends to overestimate it in high intraocular pressure values. Most of the subjects preferred iC100 tonometer.

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