ArticleFrontiers in medicine2025
Comparative morphological analysis of the zonular apparatus in porcine, feline, and canine species.
Article in Frontiers in medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: To characterize and compare the morphology of the zonular apparatus in pigs, cats, and dogs to identify the optimal animal model for studying zonular pathophysiology in angle-closure mechanisms. Methods: Porcine ( Results: Significant interspecies differences were observed in zonular fiber density, orientation, and insertion patterns. The sagittal width of posterior vitreous zonule region was notably narrower than in humans (3-4 mm): approximately 0.56 mm in pigs, 0.40 mm in cats, and 0.30 mm in dogs. UBM imaging successfully detected vitreous zonules in porcine and feline eyes, but failed to visualize them in canine eyes. Dogs and cats exhibited similar zonular and ciliary body morphology; however, both species displayed leaf-shaped ciliary bodies and looser zonular arrangements compared to the more compact porcine configuration. Ultrastructural analysis using SEM identified consistent vitreous zonule architecture in all species. Conclusion: Among the three species examined, unique zonular fiber origins and the ubiquitous vitreous zonules support the use of pigs or cats in studies of accommodation and glaucoma pathogenesis.
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