Am I Seeing Auras or just Colored Lines?

Q: I don't know if I'm seeing an aura but I read that you have to practice using your peripheral vision, but I don't really practice. Most times when I stare and concentrate on a point on someone's body I see a colourful 'shadow' or a thin as a line around their body. I've even tried it on my puppy! Is this seeing auras? Do you have to be a certain age to see auras?

Eva's Response:

I've never heard that you need to use your peripheral vision to see an aura, that means you would need to look out the corner of your eyes and sounds very weird. Try this exercise instead.

You don't need to be a certain age to see auras, though it seems there are a lot of young people who are interested. I've heard that this is to do with indigo children, but I haven't read enough into it to really comment.