Which of the following is NOT a necessary condition for wearing protective goggles?

Wearing protective goggles is essential for safeguarding your eyes from potential pesticide exposure. The conditions that necessitate the use of goggles include scenarios where there’s a risk of pesticide contact with your eyes, such as when working with highly toxic sprays or dust, or during activities like pouring or mixing concentrates.

In the context of the choices given, the situation where goggles are only required when mixing pesticides is not comprehensive enough to encompass the broader range of circumstances that require eye protection. Protective goggles should be worn whenever there is any chance of pesticide contact with the eyes, not limited to just mixing actions. This awareness is crucial for ensuring safety and preventing serious eye injuries in all scenarios involving pesticides.