How do glasses help us see? - Andrew Bastawrous and Clare Gilbert
4:24
TED
How do glasses help us see? - Andrew Bastawrous and Clare Gilbert
Today, glasses help millions of people with poor vision be able to see clearly. But how? Andrew Bastawrous and Clare Gilbert help unravel the answer by explaining refraction — the ability of a transparent medium, like glass, water, or the eye, to change the direction of light passing through it.
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