|aWhy do I need glasses? : |bvision / |cCarol Ballard
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13
|aVision
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|aChicago, Ill. : |bRaintree, |cc2011
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|a32 p. : |bcol. ill. ; |c27 cm.
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0
|aInside my body
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|aIncludes bibliographical references and index
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|aWhy do I need glasses? -- why do I blink? -- what's inside my eyes? -- how do my eyes work? -- why can't I see in the dark? -- how do I see colours? -- why do I have two eyes? -- what does an optician do? -- how do my glasses help me see? -- how can I look after my eyes? -- what if I'm blind? -- all about eyes