You're welcome.Seeing auras is about your third eye so your prescription wouldn't be a problem. But if you're irritated by it, you can search natural eyesight improvement, bates method or some other methods on the internet. I know people who got rid of their glasses. You can also try this video:
http://www.youtube.com/watch?v=OYc-C4177Ng . He also has videos on working with the third eye.
Dark blue is the color of the third eye chakra so it is about clearseeing, true knowledge and protection. It is also associated with the Archangel Michael, so add courage and righteousness to the ones above. It may be that you're developing your true vision.
Take care,
Görkem