Artist's commentary
"し": Can't See One's Hand in front of Their Face
Pronounced as "shiseki wo benzezu"... No visibility at all; an expression for not being able to see things even when they're very close to you.
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T/n: The original title, "咫尺を弁ぜず/shiseki wo benzezu", translates directly into "not even through a mere arm's length".