My eye sight is not good. Since 1977 I am wearing glasses for astigmatism. Power of my lenses vary very frequently. It changes about in a six month to ayear of my eye test. Recently I have been recommended a lens in lat June and I do not feel comfortable. Some time the same lens seem very suitable but not always. I am adiabatic since last ten years. Continue on insulin and some other madicines. Please suggest me to have better sight. Why my power changes so frequently. Very often my eyes feel problem as felt in smoke. Some times rough as felt when drenched in rain??