Labels:amusement park | apple | bulletin board | cannonball | line | person | poster OCR: IRIS AND LIGHT S YOU MOVE from light tc Pupil ] Inner iris dark, takes a while to see muscles clearly This because your eye must adapt to new light level. Iris muscles adjust within your eye, controlling the amount of light entering ir by changing the size of the pupil. Iris BRIGHT LIGHT In bright light, the inner iris Outer iris m uscles contract, stretching the muscles iris. This shrinks the pupil so that less light able through it. Bright light amages the retina. this reflex protects BRIGHT NCBMA DIM LIGHT UGHT LIGHT enter shrink
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