I have had this for 2 weeks now and mine is allergy related. It is so hot and dry here where I am and if I even walk out my front door for the past couple of weeks, my eyes feel like someone threw sand in them and my sinus' feel like they are on fire. I've been going out late late at night to do my shopping and everything because it is killing me to go out during the day when it is so hot and dry.
My right eye looks like I have constant pink eye. I used Visine for the first week, but I found this Pink Eye Medicine at Wal Mart that I have been using this week and it is REALLY doing wonders for it. Maybe you could try and see if that stuff helps you. It is by the Eyecare stuff in the Pharmacy section of Wal Mart and it is just plainly called Pink Eye Relief.
Here is a link so you can see what it looks like.... it really has been helping me alot.
Eye Drops from Similasan for Pink Eye, Allergies, Dry Eyes, and Styes