Yes, resolution is what the optometrist is checking when she has you read an eyechart.

We measure resolution in terms of the smallest angle, or direction of sight, we can perceive a change over. Angles are discussed in terms based on the old Babylonian base-60 number system. Thus, there are 360 degrees going around an entire circle. There are 60 minutes of arc, arcminutes, in a degree, and 60 seconds of arc, arcseconds, in an arcminute. The apparent size of the moon in the sky is about half a degree, or 30 arcminutes. The smallest details you can see with your eyes (not using a telescope to help) are a few arcminutes.

A more natural unit that is not based on the Babylonian numbering system is the radian. There are about 60 degrees in a radian. However, other than the example in the notes just before the link to this essay, we will stick with degrees, arcminutes, and arcseconds in the course.

As with your eyes, the resolution can be made worse if the lenses or other optics of a telescope are not perfectly shaped. However, even if the optics are perfect, there is a limit to the resolution - the smallest line you could read on the eyechart. For astronomers, the larger the telescope the better resolution it can provide. Here is why.

 This result can be explained in terms of Young's fringes discussed earlier: