What is the middle, vascular layer of the eye located between the retina and the sclera?

What is the middle, vascular layer of the eye located between the retina and the sclera?

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

Answer: (A)

The middle, vascular layer of the eye between the retina and the sclera is the choroid. It’s part of the uveal tract along with the iris and ciliary body and is rich in blood vessels that supply the outer retina, including the photoreceptors. The choroid’s vascular network (the choriocapillaris) delivers oxygen and nutrients to the retinal layers, while its pigment helps absorb stray light to reduce scatter. In contrast, the sclera is the tough outer coat, the retina is the inner neural layer, and the lens is a transparent, avascular structure behind the pupil.

The middle, vascular layer of the eye between the retina and the sclera is the choroid. It’s part of the uveal tract along with the iris and ciliary body and is rich in blood vessels that supply the outer retina, including the photoreceptors. The choroid’s vascular network (the choriocapillaris) delivers oxygen and nutrients to the retinal layers, while its pigment helps absorb stray light to reduce scatter. In contrast, the sclera is the tough outer coat, the retina is the inner neural layer, and the lens is a transparent, avascular structure behind the pupil.