[JJ_SO]

"a firmware thing" is not necessarily a more easy hack than hardware - if you imagine all the objects looking much like eyes (included our lenses) it must be a huge library or a highly developed algorithm (which needs processing power...).

 

If I think about it, there's also a tracking mode to follow a specific subject - I can define an eye as such a thing, but it doesn't discover "Eye" in a scene because it's not looking for it.