binocular

形容词 binocular:

1. relating to both eyes

1. Binoculars, telescope, microscope, photographic camera and equipment.
   双筒望远镜，望远镜，显微镜，照相机及附属品。
2. He focused his binoculars on the bird.
   他把双筒远镜的焦点对准在那只鸟上。

bin.oc.u.lar

adj.（形容词）
Relating to, used by, or involving both eyes at the same time:
双目并视的：同时用双目的或与之相关的：
例句：
binocular vision.
双视

Having two eyes arranged to produce stereoscopic vision.
用两眼使产生立体视觉的
n.（名词）
An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by both eyes and consisting of two small telescopes joined with a single focusing device. Often used in the plural.
双目镜：由两个小望远镜和一个调焦设备组成的光学设备，如一副双筒望远镜或观剧用的小望远镜，设计为同时用双眼观看。常用复数形式

【引伸】
binoc.ular.ity
binoc.ularly
adv.（副词）