Final answer:
When not actively welding, clear safety glasses are recommended to be worn under the welding helmet for eye protection from physical hazards.
Step-by-step explanation:
The recommended safety eyewear to be worn under the welding helmet for protection of the eyes when accomplishing tasks other than welding is clear safety glasses. This type of eyewear provides protection from potential hazards present in the work environment, while allowing for clear vision when the intense protection from welding filters is not required. Clear safety glasses are sufficient for protecting the eyes against physical hazards and do not provide the same level of filtration as shaded goggles or glasses designed specifically for observing welding arcs or the Sun.