During this alignment, each crystal can act like a miniature lens, refracting sunlight into our view and creating phenomena like parhelia, the technical term for sundogs.
The light that has been refracted, reflected, and refracted again reaches your eyes from millions of droplets, all at different distances and angles from you.
To accommodate, their eyes have a much rounder lens to refract light underwater, as well as teardrop-shaped pupils which can expand to 25 times their original size.