It is caused by a lack of specialist cells in the retina.
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What causes long sight?
In long sight, the eyeball is to shorter the lens is too thin, so the image is focused behind the retina.
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What causes short sight?
In short sight, the eyeball is too long or the lens is too rounded so e lens refracts light too much, so the image would be focused in front of the retina.
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What is a concave lens used for?
To correct short sight.
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What is a convex lens used for?
To correct long sight.
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Other cards in this set
Card 2
Front
What causes long sight?
Back
In long sight, the eyeball is to shorter the lens is too thin, so the image is focused behind the retina.
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