left field of retina in both eyes communicates contralaterally with right hemispheric optic cortex, vice versa.
https://en.wikipedia.org/wiki/Evolution_of_the_eye
https://academic.oup.com/jhered/article/96/3/171/2187545
left field of retina in both eyes communicates contralaterally with right hemispheric optic cortex, vice versa.