12-10-2016, 05:12 AM
In fact a radioactive lens element has never been a risk, the only serious risk is some old camera viewfinders that were radioactive, with prolonged daily use the risk of early cataract is increased, although having a cataract isn't considered a disease but just a part of normal aging process, radioactivity (as well as many other factors) just accelerate it, having repetitive x rays or scans, or working at the hospital radiology department increases the risk that's why we have strict precaution measures for radiology employees and that's why they wear special eyeglasses or goggles when exposure is inevitable.