Comparison of first, second, and third versus the average of six probe-corneal touches for intraocular measurement of two rebound tonometers in healthy horses.
Abstract: The aim of this study was to evaluate the intraocular pressure (IOP) measurements obtained from first, second, and third probe-cornea touch (PCT) and compare them with the average of six PCTs using two rebound tonometers in horses. This study enrolled a total of thirty-eight stallions, comprising of 24 Arabian horses and 14 cross-breeds (with an average age of 8 ± 3 years). The IOP measurements of first, second, and third, as well as the average of six PCTs were obtained using either Tonovet (TV) or Tonovet Plus (TV+) rebound tonometers. The mean differences (95% limits of agreement) between the average of six PCTs and the first, second, and third PCTs were 0.1 (-4.8 to 5), 0.2 (-4.8 to 4.5), and 0.2 (-3.6 to 4.0) mmHg with TV, respectively. With TV+, the differences were 0.3 (-6.6 to 7.2), 1.1 (-8.6 to 10.8), and -0.2 (-3.6 to 4.0) mmHg, respectively. Compared to the average of six PCTs, only 89.5%, 92.1%, and 97.4% of IOP measurements obtained from TV and 78.9%, 73.3%, and 65.8% of IOP measurements obtained from TV+ were within 4 mmHg of the average of six PCTs for first, second, and third PCTs, respectively. In conclusion, the measurement of IOP in the first PCT achieved best agreement with the IOP measurement of six average PCTs. Therefore, the first PCT could be considered as an alternative option for measuring IOP in horses when obtaining an average of six PCTs is not feasible.
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Publication Date: 2024-04-20 PubMed ID: 38648909DOI: 10.1016/j.jevs.2024.105074Google Scholar: Lookup
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Summary
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This research investigated the differences in intraocular pressure (IOP) measurements obtained from rebound tonometers on horses’ corneas during the first three touches compared to an average of six touches. It found that the first touch produced results closest to the average of six and could be used when multiple touches are not possible.
Participants and Instruments
- The study involved thirty-eight stallions, composed of 24 Arabian horses and 14 cross breeds.
- All animals were healthy and averaged approximately 8 years old.
- The devices used to measure IOP were two different types of rebound tonometers called the Tonovet (TV) and the Tonovet Plus (TV+).
Procedure
- Intraocular pressure was measured using both TV and TV+ during the first, second, and third probe-cornea touch (PCT).
- These readings were then compared with the average IOP from six PCTs using both the TV and TV+ tonometers.
Results
- The differences in IOP measurements between the first three PCTs and the average of six PCTs ranged from 0.1 to 0.3 mmHg for TV, and from -0.2 to 1.1 mmHg for TV+.
- 89.5% to 97.4% of TV measurements and 65.8% to 78.9% of TV+ measurements from the first three PCTs were within 4 mmHg of their respective six-PCT averages.
Conclusion
- Across both tonometers, the first PCT showed the closest agreement with the average of six PCTs.
- This suggests when taking six PCTs is impractical, the first PCT can be used as an alternative way to accurately measure IOP in horses.
Cite This Article
APA
Okur S, Yanmaz LE, Çınar H, Gölgeli A, Orhun ÖT, Turgut F, Şenocak MG, Arslan T.
(2024).
Comparison of first, second, and third versus the average of six probe-corneal touches for intraocular measurement of two rebound tonometers in healthy horses.
J Equine Vet Sci, 136, 105074.
https://doi.org/10.1016/j.jevs.2024.105074 Publication
Researcher Affiliations
- Department of Surgery, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey 25000. Electronic address: sitkican.okur@atauni.edu.tr.
- Department of Surgery, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey 15030.
- Department of Surgery, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey 15030.
- Department of Surgery, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey 25000.
- Department of Surgery, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey 25000.
- Department of Surgery, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey 25000.
- Department of Surgery, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey 25000.
- Department of Surgery, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey 25000.
Conflict of Interest Statement
Declaration of competing interest None of the authors has any financial or personal relationships that could inappropriately influence or bias the content of the paper.
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