A single word connects these images:
What is the word, and what are the connections?
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My guess is:
Hangar -> Black Hangar Studios (film studio)
Waste -> Blackwater (waste water)
Arms -> Blackarm (cotton disease)
Turn Back -> Turn Black? Black Turn: Operation Barbarossa?
Lemur Tail -> Black Lemur
Medieval Rack -> Black Death (during medieval period)
Rain -> Black Rain (action thriller or music album)
Paint -> Paint it Black (song)
Science Lab -> Black Mesa (Half-Life series)
As for the title:
When your eyes are covered, all you see is black.