To the modern mind, at first glance this seems preposterous. That the eye shoots out a beam that reveals, through reflection, the world to it. Some ass-backwards form of echo-location.
Consider all the tropes and superstitions that surround it, eyes that dart lasers, x-ray eyes, the Medusa or basilisk that with it's eye can petrify, or turn to stone, the trope of the "evil eye", or that to look on with envy is to somehow curse the object, superstitions such as stare at a funeral, look away from a wedding, the sense of being stared at, and others too numerous to name, yet quantum mechanics suggests that the gaze of the viewer is intertwined with the result.
So at first, Plato's theory rejected, and yet now we find that perhaps there was a little more to it...
And meditation, too many tropes and theories to delve into here, merely imagine it (in your mind, with your third eye, "picture it", etc) - and it will come to pass...
The dollar bill, the all-seeing eye of creation, whose gaze in fact is creation, that the eye - the "I" creates what it sees is as much founded on psychology and neuroscience as it is on folk wisdom.