Peer-reviewed veterinary case report
Eye pressure readings differ by test in dogs with lens problems
By Schlesener, Brittany N et al.·Published in Journal of the American Veterinary Medical Association·2021·View original on PubMed →
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Original publication title: Comparison of intraocular pressures estimated by rebound and applanation tonometry in dogs with lens instability: 66 cases (2012-2018).
- Species:
- dog
Plain-English summary
A group of 66 dogs with lens instability, which can cause eye problems, had their eye pressure measured using two different methods: rebound tonometry and applanation tonometry. The results showed that rebound tonometry often gave higher pressure readings compared to applanation tonometry, especially in dogs with anterior lens luxation (ALL). This means that if your vet is measuring eye pressure in a dog with lens issues, it’s best to use both methods for the most accurate assessment. Understanding these differences can help your veterinarian make better decisions about treatment and monitoring.
People also search for: dog eye pressure measurement · lens instability in dogs · anterior lens luxation treatment
Abstract
OBJECTIVE: To compare intraocular pressures (IOPs) estimated by rebound and applanation tonometry for dogs with lens instability. ANIMALS: 66 dogs. PROCEDURES: Medical records of dogs examined between September 2012 and July 2018 were reviewed for diagnoses of anterior (ALL) or posterior (PLL) lens luxation or lens subluxation. RESULTS: Estimates of IOP obtained with rebound and applanation tonometry significantly differed from each other for all types of lens instability considered collectively (mean ± SE difference between tonometric readings, 8.1 ± 1.3 mm Hg) and specific types of lens instability considered individually (mean ± SE difference between tonometric readings: ALL, 12.8 ± 2.5 mm Hg; PLL, 5.9 ± 1.7 mm Hg; subluxation, 2.8 ± 0.8 mm Hg). Median (range) differences between rebound and applanation tonometer readings for dogs with ALL was 5 mm Hg (-9 to 76 mm Hg), with PLL was 3 mm Hg (-1 to 19 mm Hg), and with lens subluxation was 3 mm Hg (-9 to 18 mm Hg). In eyes with ALL, rebound tonometer readings exceeded applanation tonometer readings on 44 of 60 (73%) occasions. CONCLUSIONS AND CLINICAL RELEVANCE: Rebound tonometry yielded higher estimates of IOP than did applanation tonometry in eyes with ALL and with all types of lens luxation considered collectively. Estimates of IOP in eyes with lens instability should ideally be obtained with both rebound and applanation tonometers. Veterinarians with only one type of tonometer should interpret results for dogs with lens instability concurrent with physical examination findings.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/34647480/