I'm shortsighted but in the last year or so have noticed that my sight for reading has deteriorated. I've worn contact lenses for years and have been given lenses to trial where one is underpowered which is supposed to deal with this. I've had them in for about twenty minutes and can definitely tell that the eye with the stronger powered lens isn't really doing anything. Very weird. Should this sensation lessen with time and how long can I expect it to be noticeable?