2022•Clinical Atlas of Canine and Feline Ophthalmic DiseaseRequires access
UVEA
Douglas W Esson, Sara Calvarese
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Abstract
This chapter describes the anatomy of the uvea of canines and felines with an illustration. The uveal tract is the heavily pigmented and richly vascular ocular tunic which encompasses the iris and ciliary body anteriorly and the choroid posteriorly, providing mechanical support, nutrition, and immune-integrity. The posterior iris base comprises the stroma and folds of the ciliary body, inserting against sclera and transitioning to the neuroretinal tissues around 360 degree at the ora serrata. Nonpigmented ciliary tissues are the source of aqueous humor (AH) production through a combination of active secretion and passive ultrafiltration. Finally, the uvea is responsible for maintaining the vascular and cellular integrity of ocular tissues via the blood ocular barriers.