Your MJ is not the cause of increased tension behind your eyes.
Mj DECREASES occular pressure up to 30% within minutes and is used by many to treat headaches, eye strain and related ailments. I use it to combat migraines and high pressure that leads to vision problems.

I cant diagnose your cause but I can rule out marijuana.

peace.
FunkyMonkey Reviewed by FunkyMonkey on . tension headache Do some people experience after they high, they get a weird tight pressure on the eyeball and a weird tight pressure on your head. I had this for about 2 weeks to be exact. I tried taking asprin but it didnt really work. Like when I move my eyes around it feels like its strained tight pressure. Sounds to me a withdrawal but not quite sure. Rating: 5