Sure, I mean, my calipers are marked in 0.05mm intervals, and I often use that much precision for CNC-related stuff, but some of the digital ones appear to show millimeters to three decimal places, which seems optimistic, even if you trust the calipers themselves.
I will admit that eye strain is a consideration, although the nicer Vernier scales are WAY better in that regard. That was actually what drove me to spend the £30 in the first place.
