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Intraocular pressure in normal dairy cattle
G.G. Gum1, K.N. Gelatt, D.N. Miller
1Pharmaceutical Development, B. Braun Medical/McGaw, Inc., Irvine, CA, USA; Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610-0126, USA; Sunset Meadows Country Animal Hospital, Gainesville, Fl 32606, USA; Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610-0126, USA.
Veterinary Ophthalmology
|June 9, 2001
Summary
Intraocular pressure (IOP) in dairy cows was measured using applanation tonometry. No significant breed differences were found between Holstein and Jersey cows, with a normal IOP range of 16-36 mmHg.
Area of Science:
- Veterinary Ophthalmology
- Ophthalmology
- Animal Science
Background:
- Intraocular pressure (IOP) is a critical parameter in ocular health.
- Establishing normal IOP ranges is essential for diagnosing ocular conditions in dairy cows.
Purpose of the Study:
- To measure and establish normal intraocular pressure (IOP) values in healthy dairy cows.
- To compare IOP measurements between Holstein and Jersey breeds.
- To evaluate the accuracy of two applanation tonometers: Mackay-Marg and TonoPen-XL.
Main Methods:
- Applanation tonometry was used to measure IOP in normal dairy cows.
- Two studies were conducted involving Holstein and Jersey breeds.
- Data were analyzed for significant differences between breeds and tonometers.
Main Results:
- Mean IOP in Holstein and Jersey cows showed no significant breed-specific differences.
- Mackay-Marg tonometry yielded a mean IOP of 27.5 +/- 4.8 mmHg.
- TonoPen-XL tonometry yielded a mean IOP of 26.9 +/- 6.7 mmHg, with no significant difference compared to Mackay-Marg.
- The overall normal IOP range for dairy cows was determined to be 16-36 mmHg.
Conclusions:
- Holstein and Jersey dairy cows exhibit similar intraocular pressure ranges.
- Mackay-Marg and TonoPen-XL tonometers provide comparable IOP measurements in dairy cows.
- A normal IOP range of 16-36 mmHg is established for healthy dairy cows.