In a far-sighted eye, incoming rays of light are bundled behind the retina rather than on the retina. The focal point is behind the retina, which means that distant objects are perceived in focus, while objects up close are blurred. The cause of this form of defective vision is usually an eye that is too short (hyperopic eye). The shorter the eye, the more pronounced the degree of far-sightedness.
The interactive animation to the side of this text allows you to see how the eye and image perception change with varying degrees of far-sightedness.
Far-sightedness can be corrected by increasing the power of refraction of the optical system. The focal point is moved forwards onto retina, for example surgically by means of laser correction or intraocular lenses, through a convex lens in glasses or through contact lenses. This correction is expressed in plus dioptres.