system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can your eyes focus on the information on "smart glasses" that is so close to your eyes?
gpt
Previous answers are missing something crucial: **a system of lenses** is used to refocus the light rays from the screen so that they appear to come from much further away.   The same system is used for "red dot sights" on guns, heads-up displays in cars and airplanes, etc.

To give more detail: light rays from an object spread out in a wide fan.  The lens and cornea of your eye must bend those light rays so they converge on a single point at the back of your eye.  Your eye only has so much "ray bending power", so that if the object is too close to your eye, the light will fan out too widely, your eye can't bend it to a point, and it ends up as a fuzzy spot.  Adding  extra lenses makes the light rays fan out less, so your eye can bring them to a focus.