Question

What is vision defect? What are its types?

Answer 1

Vision Defect

The inability of the ciliary muscles to adjust the width of the eye lens as needed and produce a picture on the retina results in a vision deficiency of vision defect.

The following are the three most frequent vision defects:

1. Myopia: Myopia, often known as near-sightedness, is the inability of the eyes to view distant things clearly. It occurs when the eye lens does not get thin as required, causing the object's image to be generated at a distance shorter than the retina. Myopia can be remedied in such a person's spectacles by utilizing a concave lens with a sufficient focal length.

1. Hypermetropia: Farsightedness, also known as hypermetropia, is the inability of the eyes to view nearby objects cl
2. early. It occurs when the eye lens does not thicken as required, causing the object's picture to be generated at a distance beyond the retina. Hypermetropia can be treated in such a person's spectacles by adopting a convex lens with a sufficient focal length.

1. Presbyopia: Presbyopia is an aging eye impairment caused by the weakening of the ciliary muscles and the lack of flexibility of the eye lens. This impairment makes it difficult for a person to see nearby as well as distant items clearly. The use of a bifocal in the person's spectacles corrects this deficiency.