Occasionally I get this painful feeling in my eye. It feels as though Im getting pins and needles poked into my eye. Its quite painful and I get it every now and then in my right eye. I tends to also slightly itch and when I do itch it, it goes extremely watery, itches more and the pins and needles seems to get more painful in my eye.What is this? And anything I can do to avoid it? I am only 16 and my eye sight is quite bad. I tend to wear contact lenses on week days and glasses on the weekends. Would this have anything to do with it?