The human eye in 3D: focusing and sight defects
Move the object nearer or further and switch between normal sight, short sight and long sight, with and without glasses.
Learn the eye properly
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Questions students ask
How does the eye focus on a near object?
The ciliary muscles contract, the suspensory ligaments slacken and the lens becomes fatter, bending light more.
Which lens corrects short sight?
A concave (diverging) lens.
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