You do not need to wear goggles while using a passive welding helmet. Passive helmets filter out most of the harmful ultraviolet rays emitted during welding. On top of that, they also prevent flying particles and sparks from reaching your eyes.
You only need to wear goggles when performing tasks such as grinding. And if you have chosen to use goggles, you do not need to top them with a passive helmet unless you do not trust their safety capabilities.