That the eyes work perfectly as they were
intended to do. Any other type of eye may
be useful in certain circumstances, but ours
are the best for seeing not only optimally, but
being able to see beauty in all of nature.
"instead of being a great disadvantage, or a “curse” or being incorrectly constructed, the inverted retina is a tremendous advance in function and design compared with the simple and less complicated verted arrangement. One problem amongst many, for evolutionists, is to explain how this abrupt major retinal transformation from the verted type in invertebrates to the inverted vertebrate model came about as nothing in paleontology offers any support. (Hamilton 1985, p. 63)"
https://answersingenesis.org/human-body/eyes/the-human-retina-shows-evidence-of-good-design/