long-sight·ed·ness
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
长视：当事物在短视力附近靠近您时无法清晰看到的状态（1）