Which of these characteristics must safety glasses have?
Active and passive safety
Explanation
To ensure **good visibility** while driving, it is essential that safety glasses are **anti-fog**. This is because anti-fog glasses prevent fogging, allowing the driver to see clearly at all times. Visibility is crucial for driving safety, as it allows the driver to observe everything happening around them and react appropriately.
- Anti-fog screens, as mentioned in the context of helmets, are recommended because they do not fog up and allow for clear vision. This also applies to safety glasses, ensuring that the driver does not have visual obstructions due to fogging.
- Additionally, it is important that the lenses of any type of visual protection, such as glasses, are **clean** and do not have elements that obstruct vision, such as stickers or non-approved colored lenses. This reinforces the need for glasses to be anti-fog, as fogging is a form of visual obstruction.
Therefore, the **anti-fog** feature is fundamental for safety glasses, ensuring that the driver maintains optimal and safe visibility at all times.
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