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Normal vision, short and long sightedness, illustration - Stock Image - C047/5828 - Science Photo Library
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What is this eye defect called when a person is long-sighted and short- sighted at the same time? - Quora
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Normal vision, short and long sightedness, illustration - Stock Image - C047/5808 - Science Photo Library
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Causes of eye defects correction using convex and concave lenses myopia short-sightedness hyperopia long-sightedness IGCSE/GCSE Physics revision notes
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