Why Do I See A Beam Of Light When Looking At Lights?

At night when im out i can see like beams of light coming off streets lights and normal inside lights to. I can also see it coming off the telly sometimes too. Is this normal or should i be worried?
also theres nothing wrong with my eyes as i know of, yes i do have and astigmatism and i wear contacts and glasses and notice the beam when im wearing either.