Choroid

Definition

The choroid is a layer of the eye located between the retina and the sclera, rich in blood vessels and pigment to provide nutrition and oxygen to the outer layers of the retina. It also absorbs light, preventing it from scattering within the eye and impairing vision.

Related terms

Retina:

The sensory membrane that lines the back of the eye, captures light rays, and converts them into electrical signals sent to the brain.

Sclera:

The white outer covering of the eyeball, providing protection and structure to the eye.

Photoreceptor cells: Specialized nerve cells in the retina that convert light energy into neural signals which are then interpreted by the brain as visual images