Myopia is the medical term for “near-sightedness”, which is a type of refractive error of the eye. Near-sighted individuals see clearly at close distances, but have blurry vision at far distances. The cornea and lens are responsible for bending light rays from an image so that they focus on a specific point on the retina (back of the eye). In myopic individuals, incoming light is focused in front of the retina. This can be corrected through glasses, contact lenses, or surgically through laser eye surgery or lens surgery.
Here is a video that presents an overview of myopia. You may change the audio and subtitles to the language of your choice by hovering over the bottom right of the video and clicking on the “CC” icon.
Here ia another video that goes over options to correct myopia.