If the right lens is higher than the left lens, bend the left temple arm down. Top tip: We only recommend doing this with wire metal frames. Plastic frames with thick temple arms may need to be heated to adjust; we do not recommend trying this at home. You should seek the assistance...
If you sit on a pair of aluminum eyeglass frames and bend them permanently (in scientific words, "subject them to a plastic deformation"), it's tricky to get them back exactly how they were. You have to use your own memory of what the frames were originally like and laboriously twist ...
changes, they don't transmit all light wavelengths as well as glass, and they don't always bend light as successfully (glass typically has a higher refractive index, although it is possible to use special, high refractive index plastic as an alternative if you want thin, light, eyeglass ...