In Jan07,i felt irritation in my eyes,tired eyes,then my eyes started to swell,i felt like blinking my eyes again n again,then a doc sugested to tke eyedrops & later on i found out tht it had steroid in it.i used those drops 4 more than month and 1 day i saw circle of rainbows around any light(which has never happened to me b4)so i got scared n stopped using it.Another doc gave me "Allergan Prefrin-A" eye drops.my eyes were better,still not perfectly alrite,i still had irritation in my eyes as if ive somthing in them...my eyes also used to get red at nite,so i went to another doc & he gave me "NaphTears" By Alcon eye drops & for the whole month i felt irritation in my eyes only once,and so far its the best,so the doc asked me to use it as long as my eyes get better and stop using it slowly like i started off using 4 times a day.i started using it from the 26th of April 2007 and its been 2 weeks since ive been using those drops thrice a day.He told me im allergic to dust.I wanna know for how long should i be using these eye drops(im using only "NaphTears" thrice a day)and is it safe to use eye drops coz ive been using different eyedrops since January 07.Does dust allergy ever go away 4good coz im sick of using eyedrops!!is this allergy for lifetime????wod i be using the eyedrops for my whole life?!!coz this allergy does not seem to go away since Jan.Its been 6 months.Im 27yrs old and i wear glasses.my eyesight is 5.5 of both eyes(cant see far things).and i dont use lenses.