u/Unique-Isopod-3504

Hi, I just purchased my first pair of prescription sunglasses and was hoping someone could help me. I bought Ray Bans and when I look at my order description it says:
Lens: Clear
single vision
grey gradient polarized
Premium
Thin

What does clear refer to in that context? It just caught me off guard, makes me feel like I got two sets of lenses for one frame. One prescription and one polarized sunglass. Hope someone knows more about this than me and could help me out. Thanks