Hyperopia is the medical term for “far-sightedness”, which is a type of refractive error of the eye. Far-sighted individuals see better at far distances but have blurry vision at close 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 hyperopic individuals, the cornea shape is more flat than round, and the focus of light rays occurs behind 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 hyperopia. 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.