Farsightedness, also known as longsightedness, is likely caused by a combination of environmental and genetic factors.    From Wordnik.com.  [Medlogs - Recent stories] Reference

Most cases of squinting are caused by longsightedness, the muscles being strained in the effort to obtain distinct vision.    From Wordnik.com.  [Hygienic Physiology : with Special Reference to the Use of Alcoholic Drinks and Narcotics] Reference

If you suffer from hyperopia, more commonly known as farsightedness or longsightedness, you may be interested to know that the world's first contact lens to correct the condition has been developed.    From Wordnik.com.  [Gizmag Emerging Technology Magazine] Reference

(short-sightedness) or hyperopia (longsightedness), but technological advances have now made more specific alterations possible.    From Wordnik.com.  [Top stories from Times Online] Reference