What is myopia? How can it be corrected?

Hint: Myopia is an eye condition which requires the use of a certain kind of lens to correct it. To answer the question about this vision condition, we are required to write about the cause of this eye condition.

Complete step by step answer:
Myopia is also known as near-sightedness. This is a common type of refractive error, in which the person suffers from a condition where the objects, closer to the individual, appear clearly, but the distant objects appear to be blurry.
The main cause of myopia is that the eyeball becomes too long so it starts affecting the cornea and the lens focus. This results in the object at a distance to appear blurry. This happens because the light rays are focussed at the front of the retina rather than directly on the surface.
The concave lens is used to correct myopia. The concave lens which is curved inwards, is placed in front of the myopic eye. The concave lens helps in moving the image back to the retina and thus helping the person to get a clearer vision.

Note: We should know that currently there is no cure for Myopia. However, wearing a concave lens can prevent the further increase of the myopic condition. The unit of measurement of near-sightedness is dioptres or D. The term high myopia is normally used to describe near-sightedness of about -5.00 to -6.00 or higher. This generally produces uncorrected visual acuity of about 20/400 or in some cases can be even worse.