Question

approved eye protection devices (such as goggles) are worn in the lab... en el laboratorio se usan dispositivos de protección ocular aprobados, como gafas protectoras.
∘ only if you do not have glasses/solo si no tienes anteojos correctivos
∘ to avoid eye strain/para evitar la fatiga visual
∘ any time chemicals, heat or glassware are used./siempre que se utilicen productos químicos, calor o cristalería
∘ to improve your vision/para mejorar tu visión

Explanation:

To determine the correct answer, we analyze each option:

• "only if you do not have glasses" is incorrect because corrective glasses don't replace safety goggles in labs with hazardous materials/equipment.
• "to avoid eye strain" is incorrect as eye strain is not the primary reason for lab goggles; they protect from hazards like chemicals, heat, or broken glass.
• "any time chemicals, heat or glassware are used" is correct. Lab safety protocols require eye protection when working with chemicals (which can splash), heat (which can cause burns or reactions), or glassware (which can break and cause injury).
• "to improve your vision" is incorrect as goggles are for protection, not vision correction (that's what corrective glasses are for).

Answer:

C. any time chemicals, heat or glassware are used./siempre que se utilicen productos químicos, calor o cristalería