Which structure is the middle vascular coat of the eye?

Which structure is the middle vascular coat of the eye?

• A. Choroid
• B. Sclera
• C. Retina
• D. Iris

Answer: (A)

The middle vascular coat is the choroid. The eye has three layers: an outer fibrous coat (sclera), a middle vascular coat (the uveal tract, which includes the iris, ciliary body, and choroid), and an inner neural coat (the retina). The choroid lies between the sclera and the retina and is highly vascular, supplying nutrients to the outer retina and absorbing excess light with its dark pigment. While the iris is part of the same vascular network, it is the anterior component of the uvea, not the main middle layer that runs behind the retina. The retina is the innermost layer, so the choroid best fits the description of the middle vascular coat.

The middle vascular coat is the choroid. The eye has three layers: an outer fibrous coat (sclera), a middle vascular coat (the uveal tract, which includes the iris, ciliary body, and choroid), and an inner neural coat (the retina). The choroid lies between the sclera and the retina and is highly vascular, supplying nutrients to the outer retina and absorbing excess light with its dark pigment. While the iris is part of the same vascular network, it is the anterior component of the uvea, not the main middle layer that runs behind the retina. The retina is the innermost layer, so the choroid best fits the description of the middle vascular coat.