Board Thread:Speculation House/@comment-27404492-20170918133425/@comment-34633327-20170926121112

RedBlaze025 wrote: You know this brings up a question a lot of people have asked what exactly are the limits/extents of the Silver eye powers and what effect do they have on things besides Grimm? We don't really know. The only on screen occurence of the Silver Eye's working was when Ruby saw Cinder kill Pyrrha, but even then it was just a fade to white and the damage being shown after the fact, the Dragon being frozen, and Cinder being scarred on the left side of body alongside the loss of her left eye. We can't even judge using Cinder because of what Salem said:

It is because of the Maiden's power. Make no mistake, Cinder, you hold the key to our victory. But your newfound strength brings with it a crippling weakness. Which is why you will remain by my side as we continue your treatment.

Its been a longstanding debate as to whether or not this meant Maiden Powers in general, or just the fact that Cinder got hers from the Grimm Bug she used. If the former, then you could say SEW's are super effective against Maidens, but not very effective against humans. If the latter, than it was again only used on a Grimm, but then that raises the question why the Dragon was frozen whereas Cinder was maimed. We have too little info to make an accurate estimate.