i have had an eye test,my eyes had deteriorated to-7 and -8,but back of eyes healthy,eye pressure in both 18,i had a field test as my mum has glaucoma and i didnt pass,i went back for a retest and right eye was much better and left eye worse than last test.i have to back for another next week,i tried my best but i go all blurry visioned after a couple of mins.what does this mean,should i be concerned?i am 41,thankyou