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Whether it is aggressive chemical substances or foreign bodies that can hit the eye and, in the worst case, injure the cornea, as sensitive as the cornea reacts to external influences, the sensitive sensory organ must be protected at work.

How exactly this has to be done is regulated, among other things, by the European standard EN 166. The rules of the trade association do not leave any questions unanswered on this point:
If it cannot be ruled out that the insured persons are exposed to accidents or health hazards, the employer shall provide personal protective equipment and keep it in proper condition. This includes eye or face protection. For example, if there is a danger from flying parts, spraying of liquids or dangerous radiation.

Easy to hurt, easy to protect: What threatens the eye in the workplace.

• Mechanical hazards: dust, push impacts, solid particles
• Thermal hazards: hot liquids, splashes of molten, flames
• Chemical or biological hazards: acid spatter, solutions, alkalis, infected blood
• Dangers from light: ultraviolet, infrared and visible radiation (light), laser
• Dangers from electricity: direct contact, arcs, short circuit

The European standard refers to protective glasses or viewing glasses. In the case of viewing glasses, a distinction is made between safety viewing glasses and glasses with filter effect. For example, goggles consist of the eyeglass body and the viewing glass according to DIN EN 166.