近きん点てん

noun, noun which may take the genitive case particle 'no'

near point (of the eye)

Ophthalmological term: the closest distance at which the eye can focus clearly. Often contrasted with 遠点 (far point).

See also: 遠点 (えんてん)

• 近きん点てんが遠とおくなると老ろう眼がんの可か能のう性せいがある。

  If the near point becomes farther away, it may be presbyopia.

noun, noun which may take the genitive case particle 'no'

periapsis

Astronomical term: the point in an orbit closest to the central body. The specific term depends on the body (e.g., perigee for Earth, perihelion for the Sun). Contrasted with 遠点 (apoapsis).

See also: 遠点 (えんてん)

• 人じん工こう衛えい星せいは近きん点てんで最もっとも高こう速そくに