Final answer:
Flat goggles would enable a fish to see better in air because they would cause the least distortion when the fish looks from water to air.
Step-by-step explanation:
A fish looking above the surface of water would see better in air with flat goggles because these would present the least distortion when transitioning from a dense medium (water) to a less dense one (air). Lens shape influences how light bends when entering different media, and a fish's eye is already adapted to the refractive index of water. Convex lenses can be used to correct farsightedness in humans, and concave lenses are used to correct nearsightedness. While polarized glasses reduce glare by blocking certain light waves, the question of goo_gles pertains to minimizing the refractive error when a fish views an environment it's not optically adapted for, not reducing glare.