Hypermetropia (long-sightedness)

Abnormality of the eye in which longdistance vision is keen, but not short-range vision. Long-sightedness can have two causes: excessive weakness of the eye’s refractory system, or too short an axis of the eye. The latter is the more frequent cause. In both cases, perception of objects in the distance is hazy In hypermetropia the eyeball is often too short. A distant object will only come into focus by an effort to adjust the lens; a close object will only come into sharp focus with a corrective spectacle lens.