- What are electromagnetic fields?
- Static and low-frequency fields
- What are static and low-frequency fields?
- Direct and alternating voltage
- Effects of static and low-frequency fields
- Reports & Evaluations
- Radiation protection relating to the expansion of the national grid
- Basics transfer of electrical power
- High-frequency fields
- What are high-frequency fields?
- Applications high-frequency fields
- Radiation protection in mobile communication
- What is mobile communication?
- Reports and evaluations
- What is optical radiation?
- UV radiation
- What is UV radiation?
- Sun but safe!
- Effects of UV radiation
- Protection against UV radiation
- UV index
- Infrared radiation
- What is ionising radiation?
- Radioactivity in the environment
- Where does radioactivity occur in the environment?
- What is the level of natural radiation exposure in Germany?
- Air, soil and water
- Building materials
- Industrial residues (NORM)
- BfS laboratories
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- Applications in daily life and in technology
- Radioactive radiation sources in Germany
- Register high-level radioactive radiation sources
- Type approval procedure pursuant to RöV and StrlSchV
- Cabin luggage security checks
- Radioactive materials in watches
- Ionisation smoke detectors (ISM)
- What are the effects of radiation?
- Acute radiation damage
- Effects of selected radioactive materials
- Consequences of a radiation accident
- Cancer and leukaemia
- Genetic radiation effects
- Individual radiosensitivity
- Epidemiology of radiation-induced diseases
- Ionising radiation: positive effects?
- Risk estimation and assessment
- Radiation protection
- Basic informations
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- What happens in an emergency?
- Federal and state tasks
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UV eye protection
Ultraviolet (UV-) radiation can cause permanent damage to both the skin and eyes. It is therefore strongly recommended not only to observe the sun protection rules but also to effectively protect the eyes from the sun.
Sun glasses are absolutely essential not only to protect our eyes against glare but also to stop UV-radiation entering our eyes. However, not all sunglasses will provide sufficient UV-protection. In contrast to glare reduction which can be tested by the customer himself, one cannot tell the UV-protective effect of sun glasses.
Measurements have shown that the manufacturers’ information is relatively reliable. For instance "UV-400", or "100 per cent UV-protection" means that the sunglasses filter out all of the UV-radiation up to 400 Nanometres (nm), which is sufficient to fulfil the UV-filtering requirements on lens quality of sunglasses. It is therefore vital to pay attention to the corresponding designation when buying sunglasses.
Please note: UV-protection provided by sunglasses lenses with vision correction may be insufficient as a result of lens processing!
As to the level of lens tint, sunglasses lenses should fall within category rating number 2 or 3. This information is mostly found on a tag or label attached to the eyeglass or to the temple arm (e.g. "cat2"). Tint category 1 scarcely protects against glare, tint category 4 is too dark to permit good sight and is, for instance, not road legal. For extreme exposure conditions such as on snow in the high mountain range, it is advisable to choose appropriate cat4-glacier goggles with side protection which in addition filter out all of the blue light.
Appropriate colourings are brown or grey. These colourings are ideal for good sight. Blue and red colourings interfere with contrast rendition and visual acuity.
Choice of material
Since UV-protective coating is specifically applied by the manufacturer, the choice between genuine glass and synthetic material is irrelevant for the UV-filtering effect. The former recommendation to use genuine glass dates back from 15 years ago when low-price sunglasses made of polystyrene were manufactured without additional UV-protection which involved indeed a serious hazard to the eyes.
State of 2017.03.01