Question

what is myopia give some points

Answer 1

myopia is a condition in which a person cannot see objects far of 20m from the eye length. myopia is an often common case these days and people affected by it are prescribed with glasses and in some stages like if your above 18 you can go for laser treatments to permanently get rid of glasses. myopia is when the light rays doesn't reach the retina of your eyes. hence your prescribed with lenses to correct it. hope it helps you!

Answer 2

The objects that are at a distance or nearby can be focused by the human eye due to its abilities. To watch objects that are nearby and focus on them the lens of the eye has a short focal length. If the curvature of the lens is large it will be able to focus on closer objects whereas if the curvature is small it will be able to focus on objects further far away. Most of the times, the effects of the defect start showing up at the extreme ends of the vision spectrum.

Myopia

Myopia or Nearsightedness occurs when the eye loses its ability focus on far-off objects as the lenses do not possess a long focal length. Objects that are near are clearly visible to patients of this defect. As we know, from the reference for countless ray diagrams describing the functioning of the eye, when the light suffers a higher refraction than the usual the eye would not be able to form an image for far away objects.

Myopia Causes

Hereditary is one of the natural factors for a person to have the defect of myopia. If any of the parents have the defect then there are chances that child will inherit the same defect upon reaching adulthood.

Mostly the young folks suffer from myopia that occurs due to elongation of the eyeball or bulging of the cornea. When the normal curvature of the cornea bulges, the light rays are refracted in such a manner that the image is formed in front of the cornea. The rods and cones of our eyes have areas where when the image is focused it has the best clarity. Thus, as the image of the distant objects is not formed at the right spot, it is detected as blurry.

Another worst cause for this type of eye defect is uncontrolled diabetes. Some unattended cataract growths may also lead to myopia.

Symptoms of Myopia

One of the common symptoms of Short sightedness or Myopia is squinting and frowning.

Short sighted people may suffer from tired eyes and severe headache by overstraining their eyes.

One of the simplest symptoms is facing difficulty in reading alphabets or letters from a specific distance.

Nearsightedness – How to correct it?

A diverging lens can be used to fix the problem of nearsightedness. As mentioned above, the image was blurry as the light rays were not diverging at the right point and creating a focused image. The rays get focused before it reaches the retina. The convergence of the light rays takes place due to the cornea producing an image on the retina