hello Beckt4him.. pain behind the eye can be due to condition called glaucoma
in which pressures in the eye become more due to many causes which could known only by detailed examination. this condition is also associated with decreased vision. another condition called migraine
which also presents like this. this will be relieved the use of analgesics.. this can also be associated with transient loss of vision for sometime. so get an ophthalmologic check up done to rule if you have glaucoma because the early you treat better the visual prognosis. this condition in a long run can cause permanent visual loss. you should better be known about this consequences.. get your eyes get checked now.. thank you. take care.