The first thing I'll tell anyone is to go to an ENT, but you did, and he gave you the best advice available to him. He's figured out that you have a sinus infection around the eye area. Unfortunately, the saline prescription he gave you won't wash out the infection, because gravity takes over before it reaches the site of your infection. Your infection is most likely in the sphenoid and/or frontal sinuses. (Google Image: sinus) to get a picture. It's very possible the pressure is messing with your eyes.
The Flip-Turn Sinus Flush is a technique that uses gravity, instead of fighting it, to get saline into ALL of the sinuses to flush out the infection. It's highly effective, according to the feedback, but it's mildly risky, because you have to bend over, ideally in a shower, although if you are older and feel it's too risky, you could do it outside in the grass or someplace soft.
http://www.medhelp.org/user_journals/show/2322
The other alternative is endoscopic surgery to suck out the infection, which has risks of its own.
Good luck,
friggy.