Lol, no. The optic nerve connects the eye to the brain. All the light information the eye detects is delivered to the brain via the optic nerve (essentially a cable) to be processed into a format you can perceive and comprehend....sight.
As an analogy, if I had a webcam woth a power cable and a cable to connect to a computer and it wasn't plugged into my computer, I wouldn't be able to see anything, even though it had power and could be taking images.
So, the eye can be 'powered' still (access to blood vessels) and still take light information in, but again, if the optic nerve isn't intact and connected, that information isn't available for your brain and therefore you to access....and see. That's a particular form of blindness.
The eyes itself could be malfunctioning and not taking light information in at all of course, that's another type of blindness.
And in response to your retina question. The retina is the important bit, the photo-sensitive cells that interact with light.