Conclusion

Although your chosen method of refractive surgery has a very high chance of being very successful, we cannot guarantee full success or that you won't need an additional enhancement or form of correction.

This means another treatment, but also glasses or contact lenses. Just like glasses or contact lenses come with their problems, complications may occur during your treatment.

Of course the treatment can be stopped at any moment. 

Your signature, placed before the treatment, indicates you have read and understood the information supplied. You have had the opportunity to ask questions and the answers have been satisfactory. 
If still you still have any questions don't wait but ask them.