乱 視(らんし)

らんし

noun

astigmatism

1. astigmatism

A vision condition caused by an irregularly curved cornea or lens, resulting in blurred or distorted vision at all distances.

乱視(らんし)があるので、コンタクトレンズは特注(とくちゅう)が必要(ひつよう)だ。

Because I have astigmatism, I need custom-made contact lenses.

乱視(らんし)を矯正(きょうせい)するメガネをかけている。

I wear glasses that correct my astigmatism.

検眼(けんがん)で乱視(らんし)の度合(どあ)いを調(しら)べた。

The eye exam measured the degree of my astigmatism.

Usage: 乱視(らんし) literally means "disordered vision." It can occur along with nearsightedness or farsightedness.

Common collocations

乱視(らんし)がある (to have astigmatism)
乱視(らんし)を矯正(きょうせい)する (to correct astigmatism)
乱視(らんし)用(よう)コンタクト (toric contact lenses)
乱視(らんし)の度数(どすう) (astigmatism prescription)

Other vision conditions

近視(きんし) - nearsightedness (myopia)
遠視(えんし) - farsightedness (hyperopia)
老眼(ろうがん) - presbyopia

Treatment: 乱視(らんし) is typically corrected with glasses (眼鏡(めがね)), toric contact lenses, or refractive surgery (屈折矯正手術(くっせつきょうせいしゅじゅつ)).

Related Words

Related: 老眼(ろうがん) (presbyopia)

Related: 近視(きんし) (nearsightedness (myopia))

Related: 遠視(えんし) (farsightedness (hyperopia))

Related: 視力(しりょく) (eyesight, vision)

Compare: 近眼(きんがん) (nearsightedness)

Related: 視力矯正(しりょくきょうせい) (vision correction)

general

Added 2026.1.17 20:32 · Revised 2026.9.2 12:02

06000/06370_ranshi