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

The collective term for the iris, ciliary body, and choroid is "uvea." This layer of the eye is located between the sclera (the outer layer) and the retina (the inner layer), and it plays a significant role in the eye's functions, such as regulating light entry, providing nutrients, and maintaining intraocular pressure.

The iris is responsible for controlling the size of the pupil and thus the amount of light that enters the eye. The ciliary body is involved in the production of aqueous humor and the accommodation process (focusing on near and far objects). The choroid contains blood vessels that supply the retina with blood, as well as pigment cells that absorb excess light.

Therefore, the term "uvea" encompasses all three structures, highlighting their related functions within the eye. Understanding the anatomy and functions of these structures is essential for anyone involved in fields related to eye health, including appraisers who may need to consider ocular health in their assessments.