long-sightedness
noun /ˌlɒŋ ˈsaɪtɪdnəs/
  /ˌlɔːŋ ˈsaɪtɪdnəs/
(also long sight)
 (both British English) North American English far-sightedness
 [uncountable]- the condition of being unable to see things clearly when they are close to you opposite short sight (1)