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Tonometry in three herbivorous wildlife species
R. Ofri1, I.H. Horowitz, P.H. Kass
1The Koret School of Veterinary Medicine, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel 76100; The Tel-Aviv Ramat-Gan Zoological Center (Safari), National Park, Ramat Gan, Israel; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, USA.
Veterinary Ophthalmology
|June 9, 2001
Summary
Intraocular pressure (IOP) was measured in Nubian ibexes, Grant zebras, and Arabian oryxes using two tonometry methods. No significant differences in IOP were found between species or tonometers.
Area of Science:
- Veterinary Ophthalmology
- Comparative Ophthalmology
- Wildlife Ophthalmology
Background:
- Intraocular pressure (IOP) measurement is crucial for diagnosing and monitoring ocular conditions in various species.
- Limited data exists on normal IOP ranges in exotic and wild ungulates, hindering accurate clinical assessment.
- Standardized tonometry protocols are essential for reliable IOP estimations in diverse animal populations.
Purpose of the Study:
- To determine and compare intraocular pressure (IOP) in Nubian ibexes, Grant zebras, and Arabian oryxes.
- To evaluate the efficacy of applanation and indentation tonometry for IOP measurement in these species.
- To establish baseline IOP data for these wild ungulates.
Main Methods:
- Tonometry (applanation and indentation) was performed on anesthetized Nubian ibexes, Grant zebras, and Arabian oryxes.
- Animals were sedated using a combination of etorphine hydrochloride and acepromazine maleate.
- IOP measurements were recorded and analyzed for statistical differences between species and measurement techniques.
Main Results:
- Mean IOP in ibexes (indentation): 17.95 +/- 4.78 mmHg.
- Mean IOP in zebras (indentation/applanation): 25.30 +/- 3.06 mmHg / 29.47 +/- 3.43 mmHg.
- Mean IOP in oryxes (indentation/applanation): 22.68 +/- 8.15 mmHg / 11.76 +/- 3.43 mmHg.
- No significant differences in IOP were observed between the three species or between the two tonometry methods.
- Gender, age, weight, side, or reading number did not significantly affect IOP measurements.
Conclusions:
- Applanation and indentation tonometry provide comparable IOP readings in Nubian ibexes, Grant zebras, and Arabian oryxes.
- There are no significant differences in intraocular pressure among these three wild ungulate species.
- This study provides valuable baseline IOP data for veterinary ophthalmological assessments in these species.