the.com/eyeball
A camera that grew itself, reports to no one, and blinks on command.
means To look at or size something up roughly, by eye, without measuring or calculating it precisely.
from The body part name is straightforward Old English/Middle English — 'eye' plus 'ball,' describing the round shape of the organ sitting in its socket. The verb sense, meaning to look at closely or estimate by sight alone, is a much later development, emerging in American English around the late 19th to early 20th century as the noun got drafted into action — turning the organ itself into the tool of the trade.
- focus method
- muscles squish the lens, not the whole eye
- blind spot
- brain quietly photoshops it away
- shared design
- octopus eyes evolved the same trick separately
- resolution trick
- sharp only in a tiny central patch, rest is guesswork