The human eye can have various defects that affect vision. The most common defects are nearsightedness (myopia), farsightedness (hypermetropia). Each of these conditions is associated with the way light is focused by the eye.
NEARSIGHTEDNESS (Myopia): In myopia, the eye focuses light in front of the retina, causing distant objects to appear blurry. This usually occurs when the eyeball is too long or the cornea is too curved.
To correct myopia, concave (diverging) lenses are used. These lenses help to diverge the incoming light rays, so they focus properly on the retina.
FARSIGHTEDNESS (Hypermetropia): In hyperopia, the eye focuses light behind the retina, causing nearby objects to appear blurry. This usually occurs when the eyeball is too short or the cornea is too flat.
To correct hypermetropia, convex (converging) lenses are used. These lenses help converge the incoming light rays, enabling them to focus properly on the retina.
To know more about eye defects and their correction:
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The human eye can have various defects that affect vision. The most common defects are nearsightedness (myopia), farsightedness (hypermetropia). Each of these conditions is associated with the way light is focused by the eye.
NEARSIGHTEDNESS (Myopia): In myopia, the eye focuses light in front of the retina, causing distant objects to appear blurry. This usually occurs when the eyeball is too long or the cornea is too curved.
To correct myopia, concave (diverging) lenses are used. These lenses help to diverge the incoming light rays, so they focus properly on the retina.
FARSIGHTEDNESS (Hypermetropia): In hyperopia, the eye focuses light behind the retina, causing nearby objects to appear blurry. This usually occurs when the eyeball is too short or the cornea is too flat.
To correct hypermetropia, convex (converging) lenses are used. These lenses help converge the incoming light rays, enabling them to focus properly on the retina.
To know more about eye defects and their correction:
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