I Have Cylindrical Error Of .25 In My Left Eye.it

i have cylindrical error of .25 in my left eye.it was diagnosed in 1997 in my teenage.there was no problem in my vision in previous years.i wore spects for 2 years and not wearing them since 1999.occasionally get watery eye(left one).got my sight checked 5 years back.still power is same,it didn't increased at all. please suggest me what should i do now?