how are eyes useful to us
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because they help us to observe the world. it is one of our sense that brain needs to complete everyday tasks.....
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The visible part of the eye is protected by the eyelids and the eyelashes, which help keep dirt, dust, and even harmful bright light out of the eye. Eyes are also protected by tears, which moisten them and clean out dirt, dust, and other irritants that get past the defenses of the eyelashes and eyelids.
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