scratch line fire up enters the fondness by means of the pupil after that the permit down pass es through the color part of the eye called the iris. If the write down is actually bright the precipitate-colored in the iris contract to answer the pupil smaller to protect the eye from damage. The contraction of the heartiness helps to see better in light. In dim light the muscle must relax to open the pupil wider to let in as much light as possible. In the pupil the light moves through the lens which focus light to focus on objects that are closer or farther away ...If you want to get a full essay, commit it on our website: OrderCustomPaper.com
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