Multiple choice

The __________ barrier is formed by endothelium of capillaries of the retina and iris.

  1. alveolar-capillary

  2. blood-brain (BBB)

  3. Blood-ocular

  4. blood-retinal

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The blood-ocular barrier is a barrier created by endothelium of capillaries of the retina and iris, ciliary epithelium and retinal pigment epithelium. It is a physical barrier between the local blood vessels and most parts of the eye itself, and stops many substances including drugs from traveling across it.