There is nothing special about human brains, whether they are conscious or not. Think of "observation" in this sense as "making your brain part of the experimen

There is nothing special about human brains, whether they are conscious or not. Think of "observation" in this sense as "making your brain part of the experiment". The only way for your brain to know the results of the experiment is for photons to go in different directions depending on the result of the experiment (well, there are other ways, but usually it's by seeing). The photon is in the state it's in because of the result, which means that, after that the photon enters your eye, your brain is also in the state it's in because of the result. But you could say the same of a dog brain, or a cow brain, or PC with a webcam for that matter. "Consciousness" has nothing to do with it.