تماشای ویدئو عینک چه طوری به ما کمک می کنه تا بتونیم ببینیم؟ از آی-ویدئو

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.