Choose different types of an eye defect.
Choose different types of an eye defect.
The correct options are
B Astigmatism
C Far-sightedness
D Near-sightedness
Myopia (near-sightedness): This is a defect of vision in which far objects appear blurred but near objects are seen clearly. Myopia can be corrected by wearing glasses/contacts with concave lenses.
Hyperopia (far-sightedness): This is a defect of vision in which there is difficulty with near vision but far objects can be seen easily. The image is focused behind the retina rather than upon it. Hypermetropia can be corrected by wearing glasses/contacts that contain convex lenses.
Astigmatism: This defect occurs when the light rays do not come to a single focal point on the retina, instead of some focus on the retina and some focus in front of or behind it. This is usually caused by a non-uniform curvature of the cornea. Astigmatism can usually be corrected by using a special spherical cylindrical lens.
B Astigmatism
C Far-sightedness
D Near-sightedness
Myopia (near-sightedness): This is a defect of vision in which far objects appear blurred but near objects are seen clearly. Myopia can be corrected by wearing glasses/contacts with concave lenses.
Hyperopia (far-sightedness): This is a defect of vision in which there is difficulty with near vision but far objects can be seen easily. The image is focused behind the retina rather than upon it. Hypermetropia can be corrected by wearing glasses/contacts that contain convex lenses.
Astigmatism: This defect occurs when the light rays do not come to a single focal point on the retina, instead of some focus on the retina and some focus in front of or behind it. This is usually caused by a non-uniform curvature of the cornea. Astigmatism can usually be corrected by using a special spherical cylindrical lens.
