longsightedness vs hypermetropia

longsightedness and hypermetropia both are nouns.

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

As nouns, longsightedness and hypermetropia are synonyms defined as:

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

Other synonyms of longsightedness include farsightedness, hypermetropy, hyperopia.

longsightedness (noun)	hypermetropia (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