A simple explanation of how the eye works. Activities that demonstrate some of the eye's functions.A precisionmade piece of optical eye testing euipment to test the eyes for normal sight shortsightedness and longsightedness. Eye testing chart included.
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A simple explanation of how the eye works. Activities that demonstrate some of the eye’s functions.
A precisionmade piece of optical eye testing euipment to test the eyes for normal sight shortsightedness and longsightedness. Eye testing chart included.
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