Board Thread:Episode Discussion/@comment-4141313-20181201123231/@comment-31953669-20181201165321

MetallicArcher wrote: Now I wonder what happened to Maria's eyes.

Does using them slowly make you go blind? Can Silver Eyes be stolen? I don't know, but going slowly blind through usage was a trait of the Mangekyo Sharingan from Naruto. Seeing as RWBY has started embracing the anime style more and more... it's certainly a possibility, and giving the eyes a serious drawback would be a good way to justify it not being used very frequently.