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:
“Your Beauty, ripe, and calm, and fresh,
As Eastern Summers are,
Must now, forsaking Time and Flesh,
Add light to some small Star.”
—Sir William Davenant (1606–1668)
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—F. Scott Fitzgerald (1896–1940)