Protective Eyewear reduce exposure to a defined hazard such as impact, particles, splash, dust, or optical radiation when the protector is correctly rated, shaped, fitted, maintained, and compatible with other equipment, while eye care devices perform a specific eye-related task such as measuring pressure, warming eyelids, humidifying the eye area, imaging, shielding, or supporting treatment.
The useful distinction begins with different mechanisms. For protective eyewear, examine hazard assessment and protection rating; for eye care devices, examine intended use and calibration. Feature lists become useful after the use case is specific.