Change of the refractive power of the glasses is not always connected with progression of the error. It can happen that weaker lenses are prescribed intentionally to make the eye work harder. That is why you should not rely on the power of the glasses you were prescribed but rather on the actual refractive error. If you have results of your past examinations – please take them for the qualifying examination to allow the doctor to compare them with current state of your eyes. Hormonal imbalance may influence the healing process negatively, that’s why it is advisable not to go off oral contraception during the 3 months preceding the operation and for 6 months after it.