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Why is refraction so important in eyeglasses.
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Why is refraction so important in eyeglasses.

User Luke Snowden
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cause if it's not there the prescription will be wrong or not be right or could damage eyes
User Sreeramu
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Normally glass correct the focus of your eyes making a light concentrate where your receptor is in your eyes. Lens have an optic relations that are based on refraction index that set positions of focus as a function of indexes.
User Manzotin
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