Set of viewers prohibits receiving half of vaccinations (10)

I believe the answer is:

binoculars

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'set of viewers' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?

'prohibits receiving half of vaccinations' is the wordplay.
'prohibits' becomes 'bars' (barring is a kind of prohibiting).
'receiving' means one lot of letters goes inside another.
'half of' means to take half the letters.
'vaccinations' becomes 'inoculations' ('inoculation' can be a synonym of 'vaccination').
'inoculations' halved is 'inocul'.
'bars' placed around 'inocul' is 'BINOCULARS'.

Can you help me to learn more?

(Other definitions for binoculars that I've seen before include "way to make distant flag seem close" , "They provide close-up" , "Field glasses" .)

I've seen this clue in The Telegraph.

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