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Home / Equine Research Bank / J Am Vet Med Assoc / Evaluation of a rebound tonometer for measuring intraocular ...
Journal of the American Veterinary Medical Association2005; 227(2); 244-248; doi: 10.2460/javma.2005.227.244

Evaluation of a rebound tonometer for measuring intraocular pressure in dogs and horses.

Abstract: To compare intraocular pressure (IOP) measurements obtained with a rebound tonometer in dogs and horses with values obtained by means of applanation tonometry and direct manometry. Methods: Prospective study. Methods: 100 dogs and 35 horses with clinically normal eyes, 10 enucleated eyes from 5 dogs, and 6 enucleated eyes from 3 horses. Methods: In the enucleated eyes, IOP measured by means of direct manometry was sequentially increased from 5 to 80 mm Hg, and IOP was measured with the rebound tonometer. In the dogs and horses, results of rebound tonometry were compared with results of applanation tonometry. Results: For the enucleated dog and horse eyes, there was a strong (r2 = 0.99) linear relationship between pressures obtained by means of direct manometry and those obtained by means of rebound tonometry. Mean +/- SD IOPs obtained with the rebound tonometer were 10.8 +/- 3.1 mm Hg (range, 5 to 17 mm Hg) and 22.1 +/- 5.9 mm Hg (range, 10 to 34 mm Hg) for the dogs and horses, respectively. Mean IOPs obtained with the applanation tonometer were 12.9 +/- 2.7 mm Hg (range, 8 to 18 mm Hg) and 21.0 +/- 5.9 mm Hg (range, 9 to 33 mm Hg), respectively. Values obtained with the rebound tonometer were, on average, 2 mm Hg lower in the dogs and 1 mm Hg higher in the horses, compared with values obtained with the applanation tonometer. Conclusions: Results suggest that the rebound tonometer provides accurate estimates of IOP in clinically normal eyes in dogs and horses.
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Publication Date: 2005-07-29 PubMed ID: 16047660DOI: 10.2460/javma.2005.227.244Google Scholar: Lookup
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  • Comparative Study
  • Evaluation Study
  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article discusses a study examining the accuracy of a rebound tonometer in measuring intraocular pressure (IOP) in dogs and horses, compared with measurements taken using applanation tonometry and direct manometry.

Research Methodology

  • The study was conducted on 100 dogs and 35 horses with clinically normal eyes.
  • In addition, 10 enucleated (surgically removed) eyes from 5 dogs, and 6 enucleated eyes from 3 horses were used in the experiment.
  • In the enucleated eyes, IOP was sequentially increased from 5 to 80 mm Hg using direct manometry, and subsequent measurements were taken with the rebound tonometer.
  • In the dogs and horses, the tonometry results from the rebound tonometer were compared with those of applanation tonometry.

Research Findings

  • The results showed a high correlation (r2 = 0.99) between the pressures obtained by direct manometry and those obtained by the rebound tonometer in the enucleated eyes of both dogs and horses.
  • The average IOPs obtained with the rebound tonometer were 10.8 ± 3.1 mm Hg (range, 5 to 17 mm Hg) for the dogs and 22.1 ± 5.9 mm Hg (range, 10 to 34 mm Hg) for the horses.
  • IOPs measured with the applanation tonometer averaged 12.9 ± 2.7 mm Hg (range, 8 to 18 mm Hg) for dogs and 21.0 ± 5.9 mm Hg (range, 9 to 33 mm Hg) for horses.
  • The rebound tonometer measurements were, on average, 2 mm Hg lower in the dogs and 1 mm Hg higher in the horses than the measurements obtained via applanation tonometer.

Conclusions

  • The research concludes that the rebound tonometer is an accurate tool for estimating IOP in clinically normal dogs and horses.
  • Although slight differences were identified when compared to applanation tonometry, there was a high degree of correlation between pressures obtained by direct manometry and those by the rebound tonometer, suggesting its validity as a reliable tool in measuring IOP.

Cite This Article

APA
Knollinger AM, La Croix NC, Barrett PM, Miller PE. (2005). Evaluation of a rebound tonometer for measuring intraocular pressure in dogs and horses. J Am Vet Med Assoc, 227(2), 244-248. https://doi.org/10.2460/javma.2005.227.244

Publication

Journal of the American Veterinary Medical Association
ISSN: 0003-1488
NlmUniqueID: 7503067
Country: United States
Language: English
Volume: 227
Issue: 2
Pages: 244-248

Researcher Affiliations

Knollinger, Amy M
  • Eye Care for Animals, 1892 E Ft Union Blvd, Salt Lake City, UT 84121, USA.
La Croix, Noelle C
    Barrett, Paul M
      Miller, Paul E

        MeSH Terms

        • Animals
        • Dogs / physiology
        • Horses / physiology
        • Intraocular Pressure
        • Ocular Physiological Phenomena
        • Prospective Studies
        • Random Allocation
        • Tonometry, Ocular / methods
        • Tonometry, Ocular / veterinary

        Citations

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