Some are 'circles of confusion' when a camera is unable to focus on an earth-form - but it could also be that the camera is unable to focus on the unseen energy - indeed circles of confusion in a literal sense as well.
Others associate them with dark or negative energy, which I feel is the fear of the unknown. It is a surprise, especially when one first notices orb/s in the image on the camera screen when there does not appear to be any object in front of the camera .
I enjoy the awe and wonder of the orbs and had a creative experience with the orb energy, as I wrote the manuscript for my book. The energy from some of the photographs gave me insights into 'being' and a connection, and I wrote what came to me as I placed the pictures. These light beings called orbs gave me insights that they are of Love and Light and they are " To lead the way forward into another era on Earth." - Lexene Burns.
"For things to reveal themselves to us, we need to be ready to abandon our views about them." - Thich Nhat Hanh.