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A contribution to indirect ophthalmotonometry in beagles
Methods and Findings in Experimental and Clinical Pharmacology
|November 1, 1986
Summary
The Schwarzer electrotonometer accurately measures intraocular pressure in dogs, providing reproducible readings. This study establishes a reliable method for canine intraocular pressure assessment using this veterinary tonometer.
Area of Science:
- Veterinary Ophthalmology
- Ophthalmology
- Animal Health
Background:
- Intraocular pressure (IOP) measurement is crucial for diagnosing and monitoring canine eye conditions.
- Accurate and reproducible tonometry is essential for reliable IOP assessment in veterinary medicine.
Purpose of the Study:
- To evaluate the suitability of the electroimpression tonometer (Fritz Schwarzer GmbH) for measuring intraocular pressure in dogs.
- To determine the accuracy and reproducibility of IOP measurements using this specific tonometer in a canine model.
Main Methods:
- Intraocular pressure was measured in 63 healthy English beagles using the Schwarzer electrotonometer with varying plunger weights.
- Friedenwald's tables and law were utilized to calculate IOP and corneal depression volume.
- A rigidity coefficient specific to dogs was determined via linear regression.
Main Results:
- The Schwarzer electrotonometer provided easily reproducible IOP readings in dogs.
- The average rigidity coefficient for dogs was determined to be 0.0103.
- Calculated mean IOP was 32.7 mmHg, with a wide individual range (12.8–54.2 mmHg); no significant sex differences were observed.
Conclusions:
- The Schwarzer electrotonometer is a suitable instrument for measuring intraocular pressure in dogs.
- The established rigidity coefficient and conversion table facilitate accurate IOP assessment in canine patients.
- This study provides a valuable tool for veterinary ophthalmologists in diagnosing and managing canine ocular diseases.