Eye Function - Light

Test yourself on Eye Function - Light

• Which structure controls our eyes’ adaptation to different light levels?

• What happens to pupil size when a person moves from a bright street into a dark cinema?

• What happens to pupil size when a person moves from a dark room into bright sunlight?

• What would happen to the amount of light reaching the retina if the iris did not decrease the pupil size in bright light?

• Which light condition lets the least amount of light enter the eye through the pupil?