Funny... It must need to synthesize the obscured portion of the eye highlight. I wonder if it grabs it from the back-facing camera, or if it's using stock images/texture synthesis?
Just waits for when you look at camera and grabs that texture.
Hunh? You can view tweets just fine without twitter accounts.
This also happens with posts from Facebook often. People just want to show the world how virtuous they are by not having accounts in popular networks, so they don’t even click the link but complain they can’t read the content. Reminds me of this: