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Farsightedness

Anatoli Silajev Comments 0 20th February 2013
Vision is usually impaired only in case of moderate or severe farsightedness

Hypermetropia or farsightedness is a kind of ametropia when parallel beams from distant objects merge behind the retina. A mild form far-sightedness (up to three dioptres) is normal refraction.

Forms of farsightedness

Moderate (3.5 – 6 dioptres) and severe forms (in excess of six dioptres) are a result of the arrested growth of the eyeball whose cause is not all that clear so far. Vision usually impairs only in case of moderate or severe farsightedness. Positive lenses usually improve vision.

The hypermetropia degree of adults does not change. However, vision at close distances may deteriorate with age as a result of impaired accommodation.