Question
Download Solution PDFA bifocal lens is used as a remedy in which of the following defects in the eyes?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
|
Defects of Vision |
Details |
Corrections |
| Myopia (short-sightedness) | The human eye can see a nearby object clearly but cannot see far away object clearly. | concave lens |
|
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 |
Explanation:
- When the eye lens becomes less elastic then it happens.
- When the Objects nearby appear to be blurred to a person then it is called Presbyopia.
- Due to presbyopia, the ciliary muscles of the eye lens becomes weak and the visual defect started.
- So option 2 is correct.
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