Or hypermetropia; Defect of vision in which a person is able to focus on objects in the distance, but not on close objects. It is caused by the failure of the lens to return to its normal rounded shape, or by the eyeball being too short, with the result that the image is focused on a point behind the retina. Long-sightedness is corrected by wearing glasses fitted with converging lenses, each of which acts like a magnifying glass. + prikaži više

Reduced ability to focus caused by loss of elasticity of crystalline lens with age.
Vision defect, an increasing inability with advancing age to focus on near objects. It is caused by thickening and loss of elasticity in the lens, which is no longer able to relax to the near-spherical shape required for near vision.