If you look closely you can see it really does only bleed to the 2 pixels right next to it (horizontally, because that’s how the scan line travels). The dots you see don’t represent a single pixel. For example the hair, on the right in the sharp image you can see a single lone bright pixel for the hair, but on the CRT it’s 4 dots. I’m assuming 3 are probably the original pixel and the 4th is a bleed, but that’s just me guessing :P

There are countless more examples online and youtube videos about it, highly recommend ^^