Peer-reviewed veterinary case report
Eye pressure changes after tropicamide in three dog breeds
By Taylor, Nicole R et al.·Published in Veterinary ophthalmology·2007·Department of Optometry & Vision Sciences, Australia·View original on PubMed →
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Original publication title: Variation in intraocular pressure following application of tropicamide in three different dog breeds.
- Species:
- dog
Plain-English summary
A group of dogs from three different breeds had their eye pressure measured before and after receiving a drop of tropicamide, a medication used to dilate the pupils. The study included Golden Retrievers, Siberian Huskies, and English Cocker Spaniels. It found that Siberian Huskies had higher eye pressure compared to the other breeds after dilation, with some dogs showing little change in pressure. This information is important for veterinarians when considering how different breeds may react to eye medications.
People also search for: dog eye pressure measurement · tropicamide effects on dogs · Siberian Husky eye problems
Abstract
OBJECTIVE: To record intraocular pressure (IOP) of three different dog breeds following administration of one drop of 1% tropicamide. ANIMALS: Three dog breeds -- Golden Retrievers (n = 20), Siberian Huskies (n = 20) and English Cocker Spaniels (n = 36) -- were studied. PROCEDURE: IOPs were measured using a Tonopen following corneal anesthesia with a single drop of 0.5% proxymetacaine. A drop of 0.5% tropicamide was then administered bilaterally and a second IOP measurement was taken 30 min later (postdilation). The difference between the two measurements was considered as the effect of mydriasis on IOP. RESULTS: Dogs had an average IOP of 14.9 +/- 3.2 mmHg, with 95% confidence limits ranging from 8 to 22 mmHg. There were significant differences between breeds (P < 0.006) with Siberian Huskies having higher IOPs (17.2 +/- 3.7 mmHg) than the other breeds (Spaniels: 14.2 +/- 2.8 mmHg, P < 0.01; Retrievers: 14 +/- 1.9 mmHg, P < 0.001). The majority (60%) of dogs displayed 5 mmHg or less in IOP change postmydriasis. Siberian Huskies showed the highest IOP levels, and also had the greatest variability with dilation. CONCLUSIONS AND CLINICAL RELEVANCE: Interbreed variability in effect of tropicamide of canine IOP is evident.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/17973829/