0
What is the difference between concave and convex lenses in improving eyesight?
Wiki User
∙ 11y ago
Both concave and convex lenses are used in improving sight.
Concave lenses are used to treat myopia or nearsightedness (shortsightedness) because they change the light's focal point from "in front of the retina" to the proper location on the retina's surface.
Convex lenses are used to correct hyperopia or farsightedness (longsightedness) by moving the focal point outward, because in a farsighted person the image is being focused "behind the retina."
Wiki User
∙ 11y ago
A concave lens is used to correct nearsightedness (myopia), where the eyeball is too long or the cornea is too curved, causing distant objects to appear blurry. It helps to diverge the light entering the eye, allowing it to focus properly on the retina. On the other hand, a convex lens is used to correct farsightedness (hyperopia), where the eyeball is too short or the cornea is too flat, causing nearby objects to appear blurry. It helps to converge the light entering the eye, allowing it to focus properly on the retina.
Add your answer:
Earn +20 pts
What is the difference between a concave polygon and a convex polygon?
Any polygon that has an angle that is > 180º is a concave polygon. A convex polygon does not. e.g. All regular polygons are convex.
what the difference between concave and convex?
Concave means bending inward, convex means bending outward.Concave . . .- thinnest in the middle- thickest around the edge- holds waterConvex . . .- thinnest around the edge- thickest in the middle- water runs off
Difference of non convex and convex?
A non convex is a concave and a convex is differently shaped
Is an arrow concave or convex?
Concave, because you can connect the corners from the outside.
What is the difference between a regular polygon and a concave polygon?
A regular polygon has all its sides equal and all its angles equal. One consequence is that no angle can be reflex (between 180 and 360 degrees). A concave polygon, on the other hand, must have at least one angle that is a reflex angle. The line joining any two points inside any convex polygon (and that includes regular ones) must lie wholly within the polygon. In a concave polygon, it must be possible to find two point inside the polygon such that the line joining them crosses the boundaries of the polygon.
Difference between concave and convex in the dark?
concave is inward, convex is outward concave is inward, convex is outward
How can you remember the difference between convex and concave lenses?
A concave surface curves inward. Cave-in
Difference between concave and plano concave?
Concave means that it bows inward (a dent instead of a bulge). Planoconcave means that one side is flat and the other side is concave.
What is the difference property between convex and concave glass?
Convex lens converges the light and a concave lens diverges the light..
What is the difference between the focus of concave and convex mirror?
the focal point of a concave mirror is positive while a convex is negative
What is a difference between concave mirror and concave lens?
A concave mirror is usually used to project something onto a screen. A concave lens is usually used to view an image through the naked eye.
What is the difference between concave lens and the concave mirror?
Not much except concave mirror reflects and concentrate the light and lens let trough and distorts the light "concave -the inner surface of a sphere." defines the shape of the lens or mirror
What is difference between cancave and canvex?
Concave curves in (like a cave) = ) and convex curves out = (
What is the difference between the way parallel light rays are affected by a concave mirror and a concave lens?
The difference between the two is that once the light passes through the concave lens it diverges, and the rays are refracted outward, and never meet a focal point. Then there is the parallel light rays that bounce off the curved surface of a concave mirror and then meet a single point ( focal point).
Uses of concave lens?
It's used in improving hypermetropic defected eye.
What is the difference between a concave and a convex polygon?
A concave polygon has lines that curve inwards whereas a convex polygon has lines that curve outwards and they are found on and inside spheres
What is the difference between a concave polygon and a convex polygon?
Any polygon that has an angle that is > 180º is a concave polygon. A convex polygon does not. e.g. All regular polygons are convex.
