...better than 20/20 vision?

[daggertrepe]

It is possible to have better than 20/20 vision (naturally and with corrective lenses). It would involve the latter number being less than 20 (20/15, for instance). It just means you have even better eyesight than normal.

"20/20", from what I've heard, is not some perfect vision that cannot be surpassed; it's just what's normal for human vision. Many animals, for instance, have far superior vision.

Raistlin has the most superior vision of all.