0
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."
Still curious? Ask our experts.
Chat with our AI personalities
Blake
Judy
ReneA 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.
