Board Thread:General Discussion/@comment-28048209-20160325202043/@comment-30501299-20161202115508

when her sprite is facing sideways you can see that she still has the eye, I think that it might be there for a solid snake style reason, it might actually help her see and counter the fish eye effect that might make aiming harder, when she becomes Undyne The Undying her magic bursts forth from her eye as a side effect of burning so much magic like an adrenaline rush making you go red with blood flow near the skin, same burn effect for Sans and MTT NEO with his right eye glowing.