How to pronounce“ehrenstein”in English

time trying to figure out because optical illusions reveal the software of visual perception.Optical illusion the whole is greater than the sum of the parts so like the one on the left that's called an Ehrenstein disc, you see a brighter white disc, the bright whitebutton in the center. Here you see an illusory triangle. The triangle seems to pop out. So these I think, these are inputs that are tricking the brain into seeing things that aren't quite