Just ask the fish, the birds, the cows and the gorillas. Each stage has more or less, depending upon the species involved, a need for sight. It became useful to have a connection to light. We humans see color and have stereophonic eyesight. We needed to advance to the stage where our minds collaborate with our environments in order to have clear representation within our minds of the multi-various capacities of Nature as well as imaginary formats in the perception of those variables.
I "see" no problem with our advanced eyesight because we can also function with the inner sight for the purposes of transmitting our subjective vistas to the World. Every movie, TV show and artistic rendition is a testimony of our fabrication of mental images. So, we humans are developed enough to pass through to the other side of Reality; the alternate Realities are our destined sojourn now in this passage to the Light.