Optical Illusion: 6 intriguing optical illusions could improve

Psychologists at the Universities of Glasgow found that staring at an optical illusion can improve visual acuity and allow you to see small print.

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Optical Illusion: 6 intriguing optical illusions could improve your eyesight

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The Scotsman crossword answers: Here are the solutions for our crosswords from Tuesday 22 December to Monday 28 December

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Optical Illusion: 6 intriguing optical illusions could improve your eyesight

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