Radiology - nuclear medicine - biomedical research
Sources of X-ray emissions:
Radiation is said to be ionising if it has enough energy to knock an electron out of an atom. This is the case for X-rays emitted by diagnostic devices. The ionisation caused by these radiations “showers” through living matter, leading to chemical modifications of 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 n° 2018-437 of June 4, 2018, lowers the radiation dose limit for the eye. This preventive measure aims to minimise the risks of exposure to X-rays. The only solution for working safely: wearing radio-protective or radio-opaque glasses.
According to Decree n°2018-437 of June 4, 2018, the new dose limits are:
20 mSv per year
100 mSv over 5 years
50 mSv in a single year
Risks:
Exposure to X-rays causes irreversible lesions and damage to your body, particularly to the lens, an adnexa 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 must be taken into account from the first doses of radiation received.
The Varionet Safety radioprotection solution:
Optimal Supercontryx lens protection
With Saint-Gobain's Supercontryx, you are guaranteed to be equipped with a product compliant with EN61331:
- Homogeneity of radioprotection over the entire surface of the lens.
- Minimum thickness of 2.4mm.
High definition
- Light transmission of 98.87%
- Anti-reflective treatment to eliminate ghost images
Personalised optical correction:
- Each corrective lens benefits from Freedom surfacing technology.
- Simple and quick measurements without the need to travel.
- Processing of your prescription by our opticians.
For your activity, we recommend:
Non-presbyopic |
Presbyopic |
||||
Lens categories |
Single vision |
Multifocal |
Single vision |
||
Types |
Traditional progressive |
Indoor or mid-distance progressive |
Bifocal |
||
Remarks |
A single correction for all working distances |
Same optical geometry as for glasses intended for use outside the operating room. |
Optical geometry reserved for work between 40cm and 4m. |
Distance vision and near vision without intermediate vision |
A rare choice accompanied by compromises on visual quality depending on distances |
Ergonomic and comfortable frame:
- Nylon front for weight optimisation.
- Adjustable non-slip rubber temples.
- Large protection surface.
Radioprotective lenses have a high optical refractive index and generate significant prismatic effects if the frame is not designed for this use. Our VH10 frame eliminates the pitching effects often felt with other equipment.
