The nerve fibres route before the retina, blocking some light and creating a blind spot where the fibres pass through the retina. However in Cephalopod eyes, the nerve fibres route behind the retina, and do not block light or disrupt the retina.
I would have found the right way to do it from Octupus DNA and create a pull request but unfortunately it's a 260 million years old code and full of junk and it takes time to get to the exact lines.
The nerve fibres route before the retina, blocking some light and creating a blind spot where the fibres pass through the retina. However in Cephalopod eyes, the nerve fibres route behind the retina, and do not block light or disrupt the retina.
I would have found the right way to do it from Octupus DNA and create a pull request but unfortunately it's a 260 million years old code and full of junk and it takes time to get to the exact lines.