Mirrors don't refract, they reflect. All lenses, on the other hand, refract (bend) the light. All cameras have lenses, to focus the image; same for eyeglasses. Some telescopes have lenses, but others are collections of mirrors. Note that some few optical elements are lenses and mirrors - like prescription sunglasses with mirror coating.
A microscope contains one or more glass lenses what do the lenses do to light that passes through them?
everything does. theoretically the only thing that does not refract light would be something that is pure black, although it is doubtful it is physically possible to make something that does that. Additional answer I presume you mean balloons. I also think you might mean reflect rather than refract, because why would a balloon refract light?