See Also: blood-aqueous barrier(medicine)
blood-air barrier(medicine)
blood-testis barrier(medicine)
Blood-brain barrier(health)
blood-retinal barrier(medicine)
blood-brain barrier(medicine)
Blood brain barrier(health)
blood-cerebrospinal fluid barrier(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Aqueous(medicine)

blood-aqueous barrier (medicine)


blood-aqueous barrier


The anatomical mechanism that prevents exchange of materials between the chambers of the eye and the blood. The tight junctions of the nonpigmented epithelium of the ciliary body, the junctions of the iris tissues, and iris blood vessels constitute the blood-aqueous barrier. Lipid-soluble substances such as oxygen and carbon dioxide penetrate the barrier at a high rate. Sodium, larger water-soluble ions, proteins, and other large and medium-sized molecules are restricted.