Clients often ask is ortho-k permanent, particularly if they are weighing up the decision between choosing ortho-k contacts or surgery for resolving myopia issues.  Ortho-k is not permanent, the effects of corneal reshaping overnight usually lasts 72 hours if you stop wearing the lenses regularly while you sleep.  While these affects are temporary, you don’t run the same risks of eye surgery, see LASIK vs Ortho-k at http://www.ortho-k.com.au.  One of our teenage patients found that after a few months of using orthokeratology, she had corrected vision which lasted up to three days- obviously depends on the individual’s cornea and the prescription as to how long the effects will last.