The human eye is incredibly sensitive towards ionizing radiation, and thus, should be protected with, for example, X-ray protective glasses. Particularly important is the correct fit of the glasses: The X-ray protective glasses must fit particularly tight to the cheeks and the sides of the user’s face. The reason for this is that the secondary radiation emitted from a lying patient does not only hit the front of the eye lenses but rather comes from below or from the sides at different angles.
Annual Dose Limit Value for Eye Lenses
The statutory annual dose limit value for eye lenses is 20 mSv (millisievert) for people older than 18 years who are occupationally exposed to radiation. By default and taking into account the level of science and technology, radiation exposure is even below this limit to be kept as low as reasonably achievable. With implementation of the European EURATOM Directive 2013/59 in national legislation from February 6, 2018 and a new radiation protection law (introduced October 1, 2017) the annual value for the eye lens dose is limited for the first time at a mandatory threshold of max. 20 mSv per year (for people older than 18 years).