Question

list the parts of the human eye that control the amount of light entering into it .Explain how.

list the functions of retina

Answer 1

Pupil control amount of light entering in the eyes.
The image forms on retina.

Answer 2

pupil and iris control the amount of light entering into eye. iris help in controlling the size of pupil. when light is more iris smalls the pupil and when light is less pupil becomes large with the help of iris.
 on retina image is formed it contain rod and con cell which helps us in seeing.