Radiology - nuclear medicine - biomedical research

Sources of X-ray emissions:

Radiation is said to be ionizing if it has enough energy to tear an electron from an atom. This is the case of X-rays emitted by diagnostic devices. The ionization caused by this radiation passes through the living matter “in rain”, causing chemical modifications of the cellular molecules. The impact on a given organ is quantified in Sieverts (Sv) or equivalent dose.

The frequency and duration of exposure are constantly increasing. Faced with the increase in cataracts among practitioners, decree no. 2018-437 of June 4, 2018 lowers the radiation dose limit for the eye. This preventive measure aims to reduce the risk of exposure to X-rays to a minimum. The only solution for working safely: wearing radio-protective or radio-opaque glasses.

Decree No. 2018-437 of June 4, 2018 relating to the protection of workers against the risks due to ionizing radiation Section 2 - Principles of prevention

Art. R. 4451-5.-In accordance with the general principles of prevention set out in Article L. 4121-2 of this code and the general principles of radiation protection of persons set out in Articles L. 1333-2 and L. 1333-3 of the code of public health, the employer shall take preventive measures aimed at eliminating or reducing to a minimum the risks resulting from exposure to ionizing radiation, taking into account technical progress and the availability of risk control measures at the source.

According to Decree No. 2018-437 of June 4, 2018, the new doses limit to:

20 mSv per year

100 mSv over 5 years

50 mSv in the same year

The risks :

Exposure to X-rays causes irreversible lesions and sequelae on your body, more particularly on the lens, a superficial and radiosensitive organ. The latter undergoes radiation damage to the posterior subcapsular part, causing a deterministic effect linked to the exposure threshold. This results in lens opacity leading to a decrease in visual acuity. The stochastic effect on the eye should be taken into account from the first doses of radiation received.

The Varionet safety radiation protection solution:

Optimal protection of Supercontryx glass

With Supercontryx from Saint-Gobain you are guaranteed to be equipped with an EN61331 standard product

  • Homogeneity of radiation protection over the entire surface of the glass.
  • Minimum thickness of 2.4mm*.

High Definition

  • 98.87% light transmission
  • Anti-reflective coating to eliminate ghosting*

* Reflection on the surface of the glass eliminated during the processing of information by the cortex. This cerebral work is a source of fatigue.

Personalized optical correction:

  • Each corrective lens benefits from Freedom surfacing technology.
  • Quick and easy measurement without having to travel.
  • Processing of your prescription by our opticians.

For your business we recommend:

Not presbyopic


Lens categories

Single vision


Single vision





Indoor or mid-distance



Only one fix

For all working distances

Same optical geometry as for glasses intended for use outside the block.

Optical geometry reserved for work between 40cm and 4m.

Far vision and near vision without intermediate vision

A rare choice with compromises in visual quality depending on the distance

Ergonomic and comfortable frame:

  • Nylon front panel for weight optimization.
  • Adjustable temples in non-slip rubber.
  • Large protective surface.

Radiation protection lenses have a high optical refractive index and generate significant prismatic effects if the frame is not designed for this use.

Our VH10 mount eliminates the pitching effects often experienced with other gear.