Have you never noticed that before going to sleep at night with your eyes closed, pictures sometimes form something like a small TV in what appears to be your eyelids?
The are not really on your eyelids only but in your visual part of the brain, but perceived to be on the eyelids. We all see these eye pictures in the dark, but most people take no notice of them.
When you go to bed before nodding off look out at the eyelids and wait you will see these images I promise
The other advice I gave is very similar to the NDE the buzzing etc. During your profound NDE can you recall the buzzing? The conscious OUT OF BODY EXPERIENCE is very similar to the NDE without the dieing part