Specific absorption rate levels measured in a phantom head exposed to radio frequency transmissions from analog hand-held mobile phones.
Anderson V, Joyner KH · 1995
Scientists measured how much cell phone radiation penetrated a model human head. They found radiation levels of 0.007 to 0.83 watts per kilogram in eyes and brain, with metal glasses increasing eye exposure by 29%. This confirmed phones emit measurable radiation into head tissues.

