IPA: /bɪˈnɒkjʊləriti/
KK: /bɪˈnɑːkjʊlərɪti/
The ability to use both eyes together at the same time to see things clearly and in depth.
The doctor tested her binocularity to ensure her vision was functioning properly.
Binocularity → It is formed from "bino-" (from Latin "bini", meaning two) and "ocularis" (from Latin "oculus", meaning eye). The word refers to the condition of having two eyes working together, hence relating to vision with both eyes.
Think of 'two' ('bino-') eyes ('ocularis') working together to see — that's what binocularity means.