What is the collective name for the iris, ciliary body, and choroid?

The collective name for the iris, ciliary body, and choroid is known as the uvea. This important part of the eye is situated between the outer fibrous layer, consisting of the sclera and cornea, and the inner layer, which is primarily the retina. The uvea plays a crucial role in providing nourishment to the eye and helps control various functions, such as the amount of light that enters through the pupil (iris) and the accommodation process necessary for focusing on objects at varying distances (ciliary body). Each component of the uvea has specialized functions that contribute to the overall health and performance of the eye.

In contrast, the retina is the light-sensitive layer at the back of the eye that converts light into neural signals and is essential for vision. The sclera, often referred to as the "white" of the eye, provides structural support and protection, while the cornea is the transparent front part that allows light to enter the eye and plays a significant role in focusing.