Gee, lets look for mistakes, shall we? There are deer with fangs. Humans have appendixes. The human eye has a blind spot where the nerve gets in the way, but the octopus eye does not..Nature don't work by making mistakes. And giving intelligence to eyeless, blind aliens would be a mistake! So, unless you can proof it, THERE IS NO WAY AN EYELESS ALIEN CAN ANALIZE A 3D IMAGE. PERIOD!
Nature doesn't care about mistakes unless those mistakes impair survivability.
And sonar is better at 3D than sight. That's why a bat hunts moths with sonar -- not sight.