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14. What is the range of vision for normal humaneye?15. How is the amount of light entering the eyecontrolled?

Answer»

14)Range of Vision is 25cm for normal human eye.

15The iris opens and closes tocontrolthe amount oflightentering theeyethrough the pupil. The pupil is the opening in the center of the iris wherelightenters theeye. When looking at theeye, the pupil appears black. ... The lens provides about 30 percent of theeye'stotal focusing power.

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