Peer-reviewed veterinary case report
Checking eye pressure in normal and glaucoma cats with TonoVet device
By McLellan, Gillian J et al.·Published in Veterinary ophthalmology·2013·Department of Ophthalmology & Visual Sciences, United States·View original on PubMed →
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Original publication title: Validation of the TonoVet® rebound tonometer in normal and glaucomatous cats.
- Species:
- cat
Plain-English summary
A study involving normal and glaucomatous cats tested two devices for measuring eye pressure: the TonoVet and the Tono-Pen XL. The TonoVet was found to be significantly more accurate than the Tono-Pen XL, especially in detecting high eye pressure, which is important for diagnosing conditions like glaucoma. Both devices provided consistent readings, but the TonoVet's results were much closer to the true eye pressure measurements. This means that if your cat is being tested for eye problems, the TonoVet may give a more reliable result.
People also search for: cat eye pressure test · glaucoma treatment in cats · TonoVet vs Tono-Pen for cats
Abstract
Objective  To validate intraocular pressure (IOP) readings obtained in cats with the TonoVet(®) tonometer. Animals studied  IOP readings obtained with the TonoVet(®) were compared to IOP readings determined by manometry and by the Tono-Pen XL(™) in 1 normal cat and two glaucomatous cats. TonoVet(®) and Tono-Pen XL(™) readings were also compared in a further six normal and nine glaucomatous cats. Procedures  The anterior chambers of both eyes of three anesthetized cats were cannulated and IOP was varied manometrically, first increasing from 5 to 70 mmHg in 5 mmHg increments, then decreasing from 70 to 10 mmHg in 10 mmHg decrements. At each point, two observers obtained three readings each from both eyes, with both the TonoVet(®) and Tono-Pen XL(™) . IOP was measured weekly for 8 weeks with both tonometers in six normal and nine glaucomatous unsedated cats. Data were analyzed by linear regression. Comparisons between tonometers and observers were made by paired student t-test. Results  The TonoVet(®) was significantly more accurate than the Tono-Pen XL(™) (P = 0.001), correlating much more strongly with manometric IOP. In the clinical setting, the Tono-Pen XL(™) underestimated IOP when compared with the TonoVet(®) . Conclusions  Both the TonoVet(®) and Tono-Pen XL(™) provide reproducible IOP measurements in cats; however, the TonoVet(®) provides readings much closer to the true IOP than the Tono-Pen XL(™) . The TonoVet(®) is superior in accuracy to the Tono-Pen XL(™) for the detection of ocular hypertension and/or glaucoma in cats in a clinical setting.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/22672669/