By costly in what bracket do you mean? If over $10 would be a bit too steep for me would you know of something less costly? I'm always feeling so tired basically due to my eyes always having that burning feeling and need to do something as quick as possiple.
Hi, I'm not a Dr. but maybe you are experiencing dry eyes which can cause as you describe? An otc product that is good (costly though) is called Gen Teal and it comes in various forms like ointment, drops, etc. Maybe see if that helps at all. Dry eyes can contribute to sand like feeling in eyes + vision not as crisp.
I would ask your dr.
C~