Board Thread:General Discussion/@comment-24.187.23.33-20130606003142/@comment-67.233.243.120-20130607020350

Maybe the eye/Omnitrix thing has something to do with his techno-organic nature. Instead of the Omnitrix simply being on him, it fits itself into his anatomy (which may explain why the same thing happened with Nanomech). Remember how Upgrade spoke with Ben's voice because of imperfect integration? This may be a sort of integration, and the Omnitrix faceplate would then presumably function like the eye, allowing him to see and use optic blasts.