How level is "level" to the naked human eye? (lemmy.ml)

submitted 4 days ago by monovergent@lemmy.ml to c/asklemmy@lemmy.ml

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I was putting up some wall decorations earlier today and was painstakingly realigning everything until it looked level to my eyes. It might be just a hair off, but if I don't correct it, I'll see the misalignment almost instantly and get bothered for the rest of time until I fix it. Has anyone investigated, or is there literature on the minimum perceptible angle from level to the naked eye?

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[-] davel@lemmy.ml 4 points 4 days ago

I think it depends on 1) the person and 2) the context and 3) the desired precision. I would use an actual level to test against my intuition before I’d have confidence in it.

this post was submitted on 11 Jun 2025

77 points (97.5% liked)

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