It is difficult to know precisely whether or not you will have problems with changing from specs to contact lenses, however there are a few groups who experience difficulty wearing contact lenses, these include;Those whose eyes are affected by severe allergiesThose who work in an environment with a lot of dust and chemicalsThose with an overactive thyroidThose with uncontrolled diabetesThose with severe arthritisThose with overly dry eyesAsk your optician for a contact lens examination to establish whether you are suitable for contact lenses and, if appropriate arrange a contact lens trial.