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Science project idea on how eyes may be injured.
Eyes Injured Science Project Idea
How eyes may be injured.It must be remembered that although the eyes are in perfect condition they may be abused, and eyestrain with its accompanying troubles will result.Too continuous focusing upon close work tires the eye.Occasionally looking away at some distant object for a few moments rests the eye to a surprising degree. Reading by a dim light causes overwork of the muscles of the iris in their effort to enlarge the pupil to admit all the light possible.The image is indistinct on the retina, causing one to hold the page closer to the eye, throwing an excessive amount of work upon the ciliary muscle.One is very apt to abuse the eye by reading in the evening as the light is fading; the eye gradually accommodating itself to the lessening light until a condition of excessive strain is reached. Too strong a light is almost as bad.The muscles of the iris make a brave effort to narrow the pupil as much as possible to shut out the excessive light which is tiring the nerve endings of the retina.
A flickering or changing in the intensity of the light coming to the eye causes constant changes in the eye.From this point of view discuss the best kind of light to be used in reading. Reading on street cars and trains, especially at night, often results in headache and eyestrain.Explain. The reading of books and papers printed in fine type or on glossy paper is highly objectionable; especially is small type objectionable in books used by young persons. Serious eye diseases have been contracted by those who have rubbed their eyes with their fingers after having been holding to a strap in a street car or after having touched door knobs or railings which have been handled by many persons.Explain.
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