binocular

a. 同时用两眼的, 两眼并用的
【医】 双眼的, 双目镜

副词:binocularly 名词:binocularity 

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）