This is the term commonly known as near-sightedness. In other words, if you are myopic you can see things up close easier than you can see things far away. This is caused by an eyeball with excessive length or a cornea that is too steeply curved (or a combination of the two). This causes light to focus in front of the retina which causes blur that is worse at distance.

We correct myopia with a “minus lens” which moves the focal point backward to precisely focus on the retina. 20/20 is achieved.