Peer-reviewed veterinary case report
Normal eye pressure, cornea thickness, and surface temperature in Van
By Kaş, Şule & Şenocak, Mümin Gökhan·Published in Veterinary ophthalmology·2026·Department of Surgery·View original on PubMed →
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Original publication title: Reference Ranges of Intraocular Pressure, Central Corneal Thickness, and Ocular Surface Temperature in Van Cats.
- Species:
- cat
Plain-English summary
A group of 307 healthy Van Cats had their eye pressure, corneal thickness, and eye temperature measured to establish normal ranges for these parameters. The study found that eye color and sex had minimal effects on these measurements, with blue-amber cats showing slightly higher eye pressure and corneal thickness than blue-blue cats. Overall, the measurements were consistent between both eyes, providing a reliable reference for veterinarians. This information can help in diagnosing and monitoring eye health in Van Cats.
People also search for: Van Cat eye pressure normal range · cat corneal thickness measurement · Van Cat eye health check
Abstract
OBJECTIVE: To establish reference ranges for intraocular pressure (IOP), central corneal thickness (CCT), and ocular surface temperature (OST) in Van Cats, and to evaluate the effects of sex and eye color on these parameters. ANIMALS STUDIED: A total of 307 healthy purebred Van Cats (98 males, 209 females) housed at the Van Cat Research Center were examined. PROCEDURES: Ophthalmic measurements were performed between 10:00 a.m. and 5:00 p.m. without sedation. CCT, IOP, and OST were measured using pachymetry, rebound tonometry, and infrared thermography, respectively. Statistical analyses compared variables by eye color and sex, assessed interocular symmetry, and explored correlations among ocular parameters. RESULTS: No significant differences were detected between right and left eyes for IOP, CCT, or OST (p > 0.05). Mean values were: IOP = 24.8 ± 6.8 mmHg, CCT = 649.1 ± 62.2 μm, and OST = 36.25°C ± 0.73°C. Heterochromatic (blue-amber) cats showed slightly higher IOP and CCT than blue-blue cats (p < 0.05). A weak positive correlation was found between IOP and CCT (r = 0.21-0.24, p < 0.01). Sex showed minimal influence, except that males with blue eyes had lower IOP than those with amber eyes (p = 0.01). OST did not differ among groups (p > 0.05). CONCLUSIONS: This study establishes breed-specific reference ranges for IOP, CCT, and OST in Van Cats. Eye color and sex exert limited effects, while the breed shows strong bilateral symmetry and stable ocular biometry. These findings provide useful benchmarks for clinical and research applications.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41668470/