遠えん点てん

noun

far point (of the eye)

In ophthalmology and optics, the farthest point at which the eye can focus clearly without accommodation. Often contrasted with 近点 (near point).

See also: 近点 (きんてん)

• 近きん視しの人ひとの遠えん点てんは、正せい視しの人ひとより近ちかい。

  The far point of a nearsighted person is closer than that of a person with normal vision.

noun

apoapsis

In astronomy, the point in an orbit farthest from the central body. The specific term (apogee, aphelion, etc.) depends on the central body. Contrasts with 近点 (periapsis).

See also: 近点 (きんてん)

• 人じん工こう衛えい星せいが遠えん点てんを通つう過かするとき、速そく度どは最もっとも遅おそくなる。

  When a satellite passes through its apoapsis, its speed is slowest.