Pain behind my left eye when I move my eye up, down, left and right

[jwporter]

It's been 4 weeks since my surgery and overall, I'm getting better. Thanks so much to all of you who have answered my questions in the past. I LOVE this forum.

When I first came home, I didn't really use any drops, though I probable should have. I've been using them quite religiously for about two  weeks. I am using Systane high performance, and I also just  bought Visine Tears for a comparison. 

Since using the drops, I have  experience pain behind my left eye (the tumor was on the left ear) when I look up, down, left and right, especially when I do my Vestibular exercises.

Could this be because of dryness? Have any of you experienced this? I know I should go to an eye doctor, but between my weekly visits to my ENT and my weekly vestibular physical therapy, I'm at the mercy of whoever will drive me.

Thanks so much!