For cameras, usually those use thoriated glass due to its high refractive index. Radioactivity level is too low for even slightest damage as thorium dioxide mos

For cameras, usually those use thoriated glass due to its high refractive index. Radioactivity level is too low for even slightest damage as thorium dioxide mostly emits alpha particles that is easily blocked. There are urban legends about radioactive lenses causing fogging of the film inside a camera if left mounted for few years but I couldn't verify them. https://en.m.wikipedia.org/wiki/Thoriated_glass https://en.m.wikipedia.org/wiki/Thoriated_glass https://camerapedia.fandom.com/wiki/Radioactive_lenses https://camerapedia.fandom.com/wiki/Radioactive_lenses