Hi, I have been doing a coarse lately and am currently studying refraction. And it got me thinking about refractions effects on the Cosmic Microwave Background. If the cmb is light from the early universe then I think it would be ridiculous to assume that this light has travelled through nothing but vacuum from the point it was emitted. And over such a large distance even the slightest bend in the light could make a huge difference in an objects perceived location. Could the CMB just be a scrambled picture of the early light from the universe were none of the objects are were they appear to be? And if so could any research done using it be potentailly misguided?