The information in the CASA DAME handbook is a little dated, as it does not mention the newer procedures like LASIK and LASEK. The guidelines for certification after the procedure should be the same.
.....the refraction takes some time to stabilise to its new value.
Flying is not permitted while the refraction is still plastic. Evidence of stability requires:
-A variation not exceeding 0.25 dioptres in refraction
-A visual acuity changing by not more than one Snellen line, and
-Visual acuity, which at least satisfies the minimum standard for the class of licence, at three paired serial measurements.
These three paired serial measurements are to be part of a full ophthalmological examination, are to include measurements early in the morning and late in the day, and must be delayed for at least three months following surgery. Note that some eyes may not have stabilised even as late as a year after surgery.
All applicants whose eyes have stabilised following radial keratotomy (and the others) must thereafter have an ophthalmological assessment every two years for Class 1 & 3 and every five years for Class 2 Medical Certificates.
Hope this helps. If your refractive error is "not too bad", I'm not sure why you are having it done though. There is no restriction on glasses or contact lenses for a CASA Class 1.