- The function of the pupil is it regulates the amount of light entering the eye.
- The pupil react to bright light is when we go under the sun, we have a lot of sun light, the pupil will shrink to reduce the amount of light into the eye.
- The pupil react to dim light is at night, when very little light, the pupil will dilate to let more light into the eye so that we can see at night.
- The change of the size of the pupil affect the sharpness of the image is the smaller size of the pupil, the more sharpness than dilated