Retina, iris, pupil, cornea, lens, etc. how do these eye parts function?

The functions of eyes parts are as follows:

Retina: The rays of light focused on the retina by the cornea and lens. The retina produces an image which is sent along the optic nerve of the brain.

Iris: It changes the size of pupil and allows different amount of life to enter the eyes.

Pupil: The light enters to the eyes through it.

Cornea: It forms the outer coating of the eyeball and covers the iris and pupil.

Lens:

grad-point “it contracts and expands to control the amount of light that enters the eye” for iris

Explanation:

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem