Small Objects and Maps
Observing a nearby small object without a magnifying glass or a microscope, the optimal distance is 20–25 cm. At this close range, 0.05 mm can be seen clearly. The accuracy of a measurement ranges from 0.1 to 0.3 mm and depends on the experience of the observer. The latter figure is the usual positional accuracy of faint details in maps and technical plans.
Read more about this topic: Naked Eye
Famous quotes containing the words small, objects and/or maps:
“What a profound significance small things assume when the woman we love conceals them from us.”
—Marcel Proust (1871–1922)
“I was afraid that by observing objects with my eyes and trying to comprehend them with each of my other senses I might blind my soul altogether.”
—Socrates (469–399 B.C.)
“And at least you know
That maps are of time, not place, so far as the army
Happens to be concerned—the reason being,
Is one which need not delay us.”
—Henry Reed (1914–1986)