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Eye and face injuries are often caused by flying particles, splashes and radiation. Safety glasses, goggles and face shields all help, but they protect in different ways. Here is how to decide which one fits your task.
Safety glasses
Safety glasses are the standard choice for general workshop use, assembly and light machining. Look for the EN 166 marking on the frame and lens. The letter after the standard number describes the mechanical strength: S for increased robustness, F for low-energy impact, B for medium-energy impact and A for high-energy impact. Side shields add protection against particles from the side.
Goggles
Goggles form a seal around the eyes. They are the right choice against dust, fine particles, liquid splashes and gas. Indirect ventilation is recommended for chemical splashes; anti-fog coatings (marked with N) are important when you work in changing temperatures.
Face shields
A face shield protects the whole face against splashes, sparks and larger flying particles. It is not a replacement for safety glasses: in many situations, such as grinding or chemical handling, you wear a face shield in addition to safety glasses or goggles, because a shield does not seal around the eyes.
Other markings worth knowing
- K: resistance to surface damage by fine particles.
- N: resistance to fogging.
- 3: protection against liquid droplets and splashes; 4: large dust particles; 5: gas and fine dust.
- UV filters (2C-1.2 and similar): tinted lenses for UV and glare, for example for outdoor work.
Fit and comfort
Protection only works when eyewear is worn. Choose a style that sits comfortably, does not slip, and works over prescription glasses if necessary. Clean the lenses regularly with a soft cloth and replace scratched lenses, because scratches reduce vision and strength.