Myopia (commonly known as “nearsightedness” and “shortsightedness”), is a condition of the human eye where the light that comes in, does not directly focus on the retina, but in front of it. So when looking at distant objects, the image that one sees tends to be out of focus, but in focus when looking at a close object.

Myopia is being corrected through the use of corrective lenses, such as glasses or contact lenses. The corrective lenses have a negative optical power (i.e. are concave) which compensates for the excessive positive diopters of the myopic eye.