eye-feeling like something in eye or hanging around outside it

[Guest guest]

I can't describe the feeling that started today, but to say it is like there is a thread or some lightweight object in front of my eye. Doesn't hurt. It's like something sitting there over part of eye and really there is nothing there. Any clues on what this is called and how to treat it? It could also appear like some pieces of dust in the eye but not so. I know I have been in massive bad lighting in a training program and computer screen has ben bad so am wearing glasses about 8 hours daily for past 2 weeks. Any suggestions? I will try coming back later or else tomorrow eve for sure. Hopefully by then this nagging feeling by my eye will be gone too. Thanks. carolg