The term resolving power of an optical instrument, including the eye, means the ability to obtain two separate images from two different point sources.
The eye sees two point objects separated if the image of each individual point falls on another cone. If the images fall on the same cone, the eye no longer sees them together, so we say that it no longer distinguishes them. A normal eye can still distinguish endpoints separated by 0.1 mm at a clear vision distance of 25 cm.
Author:
prof. Emil Šatalić
