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

The collective name for the iris, ciliary body, and choroid is the uvea. This term encompasses these three important structures of the eye, which are all part of the middle layer, or vascular layer, of the eye.

The iris controls the amount of light entering the eye by adjusting the size of the pupil. The ciliary body is involved in the production of aqueous humor and the accommodation process, helping to focus on objects at various distances. The choroid provides nutritional support and helps maintain the temperature of the retina. Together, these components work to support vision and overall eye health.

Understanding the terminology and functions of these anatomical structures is crucial for grasping the overall functioning of the eye, as they contribute to both the protection and maintenance of the retina, which is responsible for converting light into nerve signals.