hypermetropy vs longsightedness

hypermetropy and longsightedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypermetropy	Yes	No	No	No
longsightedness	Yes	No	No	No

As nouns, hypermetropy and longsightedness are synonyms defined as:

hypermetropy and longsightedness: abnormal condition in which vision for distant objects is better than for near objects

Other synonyms of hypermetropy include farsightedness, hypermetropia, hyperopia.

hypermetropy (noun)	longsightedness (noun)
abnormal condition in which vision for distant objects is better than for near objects	abnormal condition in which vision for distant objects is better than for near objects