O10_5-10-10 - O10: Eyes as an optical instrument and...

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O10: Eyes as an optical instrument and corrective lenses Materials: Your eye, mirror, flashlight, optical bench, various concave and convex lenses Initial definitions and givens: Category Near Point Far Point Normal vision 15 - 25 cm Greater than 2 m Farsightedness Greater than 30 cm Greater than 2 m Nearsightedness 10 - 25 cm Less than 1 m Initial instructions and questions: 1) Look at your eye in a mirror and describe in your lab notebook the structures that you see. Give as much detail as possible. 2) Shine a flashlight into your eye. What happens to your pupil? 3) Hold a piece of paper with text in front of you. Slowly move it toward your eye until it becomes blurry, then slowly move it back until it just comes back into focus. Measure the distance from your eye to the paper. This point is called the near point of your vision. If you wear glasses, measure this distance with and without your glasses. 4)
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O10_5-10-10 - O10: Eyes as an optical instrument and...

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