hypermetropia vs longsightedness

hypermetropia and longsightedness both are nouns.

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

As nouns, hypermetropia and longsightedness are synonyms defined as:

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

Other synonyms of hypermetropia include farsightedness, hypermetropy, hyperopia.

hypermetropia (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