Contact lenses can correct higher-order aberrations in the cornea or lens that standard glasses cannot, potentially leading to a higher quality of vision.

“but then there's higher order aberration in our corneas in the clear window in the front of our eyes or or to some degree in the lens inside the eye that are that are focusing the light that the glasses prescription can't correct but if you have nice smooth contact lens on the front it can correct so a lot of people who wear glasses and contacts will report that they have a much higher quality of vision with their contact lens correction than with their glasses correction”