Clear Streak In Eye. No Pain Or Discomfort. What Could It Be?

I will be going to an opthamologist tomorrow. Since yesterday there is a small clear like streak in my Scleral in my right eye. Yesterday, I thought it would be a piece of hair or particle, as it would feel a tiny bit irritating, and I would remove it. Upon my thorough observation on my eye, I saw the streak, and have used Visine Totatlity. I can see fine, it doesnt hurt, or its not that irritating, but it is a tiny bit irriating. If the eye wasn t such a sensitive organ I would have reached in and sort of if possible taken in out, as long as it was foriegn born, not in born within the eye. I am so curios because of the fear of the what the opthamologist will say tomorrow during my emergency visit. What do you think it could be?