Question

What is Hypermetropia? How can it be corrected?

Answer 1

Hint: Define hypermetropia, mention causes of it. List the corrections available for hypermetropia.Hypermetropia is also known as long-sightedness. A myopic person is only able to see the near objects clearly while in hypermetropia the reverse of it happens. Generally, old aged people use eyeglasses.

Complete answer:
Hypermetropia is also known as hyperopia. There are two most common eye conditions which arise due to the imagine being formed behind or in front of the retina as the case maybe.
Let us first understand how images are formed and how we are able to see different objects.
There are various parts of our eye, we see objects as these parts work together. These parts are:
Iris: It is the coloured part of the eye.
Cornea: Cornea is a clear dome over the iris.
Pupil: The black circular opening in the iris.
Sclera: the white part of our eye.
Conjunctiva: a thin layer of tissue that covers the entire front of our eye, except for the cornea.
Retina: Retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve; images are visible when photons of light fall on the retina.
Lets now see how these parts actually work; When light particles hit the retina, special cells known as photoreceptors turn the light into electrical signals. Then, these electrical signals travel from the retina through the optic nerve to the brain. Then the brain turns the signals into the images which we see.
Now in case of hypermetropia, the image is formed behind the retina. As a result, a blurry image is obtained.
The corrections are:
1) By using corrective eyeglasses
2) By using contact lenses.
3) Refractive surgery.

Note:
Remember that hypermetropia or hyperopia is an eye defect and not a disease. It can be corrected. Hypermetropia is also known as long sightedness and it leads to problems with near vision while the person can see far or distant objects clearly. Laser treatment is expensive but it has complications too.