What is the function of the iris?
What is the relationship of the pupil to the iris?
What does the pupil do?
What is the relationship of the choroid to the ciliary body?
What is the relationship of the suspensory ligaments to the ciliary body and to the lens?
The iris is a colored circular muscle in the eye that controls the size of the pupil. It functions to regulate the amount of light that enters the eye by changing the size of the pupil.
The pupil is the opening in the center of the iris that allows light to enter the eye. It is controlled by the iris muscles, which adjust its size depending on the amount of light available.
The pupil itself is responsible for regulating the amount of light that enters the eye. In bright conditions, the pupil constricts to reduce the amount of light entering the eye, while in low light conditions, it dilates to allow more light in.
The choroid is a layer of blood vessels that provides nutrients to the eye and helps regulate temperature. It is located behind the retina and is connected to the ciliary body, which controls the shape of the lens.
The suspensory ligaments connect the ciliary body to the lens and help hold the lens in place. They are important for adjusting the shape of the lens to focus light onto the retina, allowing for clear vision at different distances.