The correct answer is Concave lens.
Key Points
- To treat the eye disease known as myopia or nearsightedness we use the Concave Lens.
- A concave lens is a category of lens that deviates a straight light beam coming from the origin to a diminished, upright, virtual image.
- It can construct both real and virtual images.
- The convex lens is a lens that tends to meet at a point of rays of light that convey parallel to its principal axis which is comparatively thick across the middle and thin at the lower and upper edges.
- A convex lens is used in cameras, correction of Hyperopia, etc.
- Bifocal lenses hold two different prescriptions, an upper part to allow for distance vision and an additional power on the bottom part of the lens to help in close-up focus.
- A bifocal lens is used in people suffering from presbyopia, myopia, hyperopia, and astigmatism.
- The result is eyesight lucidity at both distance and near with one pair of glasses.
- A Compound lens is simple lenses made on a general axis usually in close proximity and often cemented with each other.
Additional Information
|
Defects of Vision |
Details |
Corrections |
|
Hypermetropia or Farsightedness |
The human eye can see distant objects clearly but cannot see nearby objects clearly. |
Convex Lens |
|
Presbyopia |
In this defect, both near and far objects are not clearly visible. It is an old age disease and it is due to the losing power of accommodation. |
Bifocal lenses |
|
Astigmatism |
In this defect, the eye cannot see horizontal and vertical lines clearly, simultaneously. It is due to the imperfect spherical nature of the eye lens. |
Cylindrical lens |

