[2] But, due to this accommodative effort for distant vision, people may complain of eye strain during prolonged reading.

It may occur when the axial length of eyeball is too short or if the lens or cornea is flatter than normal.

[2] Risk factors include a family history of the condition, diabetes, certain medications, and tumors around the eye.

At a young age, severe far-sightedness can cause the child to have double vision as a result of "over-focusing".

[2] Aetiologically, causes of hypermetropia can be classified as: Far-sightedness is often present from birth, but children have a very flexible eye lens, which helps to compensate.

[14] In rare instances, hyperopia can be due to diabetes, as well as problems with the blood vessels in the retina.

[15][16] In severe cases of hyperopia from birth, the brain has difficulty in merging the images that each individual eye sees.

If the brain never learns to see objects in detail, then there is a high chance of one eye becoming dominant.

[medical citation needed] Hyperopia is typically classified according to clinical appearance, its severity, or how it relates to the eye's accommodative status.