What is the middle or vascular layer of the eye known as?

The middle or vascular layer of the eye is known as the choroid. This layer plays a crucial role in providing nourishment to the eye's outer layers and is rich in blood vessels, which supply the necessary nutrients and oxygen to the retina and other parts of the eye. The choroid also contains pigment cells that help absorb excess light, preventing reflections that could interfere with clear vision.

The choroid is positioned between the outermost layer, known as the sclera (the white part of the eye), and the innermost layer, called the retina, which is responsible for converting light into neural signals. This anatomical arrangement is vital for the proper functioning of the eye, allowing it to maintain a stable environment for the retina and enhancing visual clarity.