Evaluation of the Perkins handheld applanation tonometer in horses and cattle.
Abstract: The objective of this study was to evaluate and validate the accuracy of the Perkins handheld applanation tonometer for measuring intraocular pressure (IOP) in horses and cattle. Both eyes of 10 adult horses and cattle were evaluated in a postmortem study. The eyes from 10 clinically normal adult horses and cattle were also examined after bilateral auriculopalpebral nerve block and topical anesthesia for an in vivo study. IOP was measured postmortem using direct manometry (measured with an aneroid manometer) and tonometry (measured with a Perkins handheld applanation tonometer). The correlation coefficients (r(2)) for the data from the postmortem manometry and Perkins tonometer study were 0.866 for horses and 0.864 for cattle. In the in vivo study, IOP in horses was 25.1 ± 2.9 mmHg (range 19.0~30.0 mmHg) as measured by manometry and 23.4 ± 3.2 mmHg (range 18.6~28.4 mmHg) according to tonometry. In cattle, IOP was found to be 19.7 ± 1.2 mmHg (range 18.0~22.0 mmHg) by manometry and 18.8 ± 1.7 mmHg (range 15.9~20.8 mmHg) by tonometry. There was a strong correlation between the IOP values obtained by direct ocular manometry and the tonometer in both horses and cattle. Our results demonstrate that the Perkins handheld tonometer could be an additional tool for accurately measuring IOP in equine and bovine eyes.
Publication Date: 2011-05-19 PubMed ID: 21586877PubMed Central: PMC3104172DOI: 10.4142/jvs.2011.12.2.171Google Scholar: Lookup
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- Evaluation Study
- Journal Article
Summary
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This study aims to validate the accuracy of the Perkins handheld applanation tonometer for measuring intraocular pressure in horses and cattle, showing that it could be useful in accurately measuring intraocular pressure in equine and bovine eyes.
Objective of the Study
- The research aimed to validate the Perkins handheld applanation tonometer’s effectiveness in accurately measuring intraocular pressure in horses and cattle.
Methodology
- Both eyes of 10 adult horses and cattle were subjected to the test. The researchers used two methods for this study conducted postmortem and in vivo.
- Postmortem, both eyes from the animals were evaluated using direct manometry (where IOP was measured with an aneroid manometer) and measured using a Perkins handheld applanation tonometer. Ten clinically normal adult horses and cattle were also examined after anesthetization in the in vivo study.
- The intraocular pressure (IOP) of the animals was subsequently measured and recorded.
Findings
- The result of the study showed a strong correlation between the IOP values obtained by direct ocular manometry and the tonometer in both horses and cattle.
- In the postmortem manometry and Perkins tonometer study, the correlation coefficients for horses and cattle were 0.866 and 0.864, respectively.
- In the in vivo study, IOP in horses was marginally higher by manometry than by tonometry. The same trend was observed for cattle. Despite the slight difference, the correlations were strong.
Conclusion
- The research concludes that the Perkins handheld tonometer is capable of accurately measuring intraocular pressure in equine and bovine eyes, making it a relevant tool in animal healthcare.
Cite This Article
APA
Andrade SF, Kupper DS, Pinho LF, Franco EC, Prataviera MV, Duarte RR, Junqueira JR.
(2011).
Evaluation of the Perkins handheld applanation tonometer in horses and cattle.
J Vet Sci, 12(2), 171-176.
https://doi.org/10.4142/jvs.2011.12.2.171 Publication
Researcher Affiliations
- Department of Small Animal Medicine, University of Oeste Paulista, Rodovia Raposo Tavares, km 572, CEP 19001-970, Presidente Prudente, Brazil. silviafranco@unoeste.br
MeSH Terms
- Animals
- Cattle / physiology
- Eye / physiopathology
- Horses / physiology
- Intraocular Pressure / physiology
- Linear Models
- Manometry / instrumentation
- Manometry / veterinary
- Tonometry, Ocular / instrumentation
- Tonometry, Ocular / veterinary
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This article includes 23 references
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Citations
This article has been cited 3 times.- Peche N, Eule JC. Intraocular pressure measurements in cattle, sheep, and goats with 2 different types of tonometers.. Can J Vet Res 2018 Jul;82(3):208-215.
- Zouache MA, Eames I, Samsudin A. Allometry and Scaling of the Intraocular Pressure and Aqueous Humour Flow Rate in Vertebrate Eyes.. PLoS One 2016;11(3):e0151490.
- Arora R, Bellamy H, Austin M. Applanation tonometry: a comparison of the Perkins handheld and Goldmann slit lamp-mounted methods.. Clin Ophthalmol 2014;8:605-10.
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