Unlike people with short sightedness (myopia), people with long sightedness (hyperopia) have an eye that is slightly shorter or the curvature of the cornea is flatter than normal.
Light rays that are refracted from the cornea through the lens of the eye converge incorrectly and the image becomes out of focus on the retina.
People who are long sighted usually have problems viewing objects that are nearby.
However long distance vision may also be affected.
Long sightedness can be treated with laser eye surgery.