Your eye is like a ball. The eyes have 6 parts:
pupil, iris, cornea, lens, retina and optic nerves.
Pupil is a small black spot.
Iris is the colorful part of an eye. Cornea is a white part of an eye.
Iris is the colorful part of an eye. Cornea is a white part of an eye.
Light passes to the cornea, arqueous humor and lens, then goes to the retina, finally the image goes to the brain and the image turns around. The pupil is like a window it can open our shut to let the light in. For example if you are in a dark room your pupil is big. If you switch the light on your pupil gets small. The pupil and lens are adjusting all the time. So you can see clearly. Some people can't adjust properly and they need to use glasses.
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