What structure consists of muscles that control and shape the pupil?

Answer 1

The iris dilates in dimmer light to allow more light into the eye through the pupil then lens, through the inner eye onto the retina, and finally to the optical nerve. The iris will contract when lots of light is exposed to the eye to allow less light into the eye, so we are not blinded.

Sources:

My science teacher in 5th grade. :)

Answer 2

Cornea I think

Answer 3

hello!?!? The Iris!

The iris is the colored part around your eye. The iris itself is a sphincter muscle. This muscle will dilate and contract when the Oculomotor Nerve ( the third cranial nerve) is stimulated by low or high light. The cornea is a protective covering on the outside of the eye.

Answer 4

The sphincter pupillae and dilator pupillae are the smooth muscles that make up the iris, which controls the light entering the eyes. They expand when there is less light and contract when there is enough light.

Answer 5

The structure is called iris which can be described as a circular pigmented membrane behind the cornea, perforated by the pupil. This structure consist of two antagonistic muscles - circular (inner) and radial (outer) arranged as spokes which function together in regulating the amount of light needed for an object's sharp image to be identified on the retina. Therefore, the more light the more the constrictor effect of circular muscle to minimise the intensity of the light needed for good focussing power. On the other hand, the less light the more the effect of the radial muscle to increase the light intensity for an object to be identified by the eye clearly.

Answer 6

Having healthy eyes is important, as well as knowing how they function. The part of the eye called the Iris (the part that is colored) controls how much light enters the eyes.

Answer 7

iris