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How do concave lenses and convex lenses help improve vision?

In: Eyes and Vision Disorders, Physics, Contact Lenses [Edit categories]

Answer:

If you are farsighted, meaning that you can see far but you can't see objects close up, that means your eye is too short in terms of the distance of your retina to your lens. The image focuses behind the retina, so it becomes blurry. When you add a convex lens, it will help bend the light more and converge the light rays onto the retina, so you will see the image clearly.

If you are nearsighted, your retina is farther away from your lens, so the image is focusing in front of your retina, so you can't see distant objects. That's when you need a concave lens. Concave lens will diverge the light rays onto the retina.

First answer by ID0414451520. Last edit by ID0414451520. Question popularity: 3 [recommend question].

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Relevant answers:

How are convex lenses and concave lenses the same?
No. Convex lens bulge outward, and concave lenses go in ward. Convex lenses focus light, and concave lenses spread light out.
What are the concave and convex lenses?
Concave and convex lenses are curved lenses that bend light in a predictable manner depending on their radius of curvature and index of refraction. A concave lens bend inwards and a convex lens bends...
Uses of concave and convex lenses?
Both concave and convex lenses are used in glasses; A microscope, like a reflecting telescope, uses a concave mirror, a plane mirror, and a convex lens; A refracting telescope uses two convex lenses...
Are contact lenses concave or convex?
contact lenses are concave because their sides curve inward
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