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State the defects of vision in human eyes and its remedies. Explain the defect of myopia and remedies to control it.
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The focal length of a normal eye-lens is about:$(a){\\text{ 1mm}} \\\\(b){\\text{ 2cm}} \\\\(c){\\text{ 25cm}} \\\\(d){\\text{ 1m}} \\\\ $
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The Ultimate Battle Between The Human Eye And The Camera - You decide yourself which one is better! | Battle, Adjustable lighting, Focal distance
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