I have a central corneal thickness of 470 in both eyes, (too thin for LASIK?). Do You Recommend ICL or PRK For Thin Corneas?

Your case falls in the grey zone for PRK procedure. Even though the residual cornea after your treatment would be above 250 Micron (the lowest number which is considered to be a safe and within the standard of care), some physicians consider any cornea less than 500 micron at a higher risk for destabilization following any type of corneal thining procedure and advise against them.  ICL is an intraocular procedure that in my opinion has a much higher risk of long term serious complications than does PRK. So I would not recommend ICL. 

With corneas as thin as yours, I would be reluctant to recommend LASIK or PRK. Using the standard Randleman criteria, you would be classified as "high risk" for LASIK and "unknown risk" for PRK. If you are determined to have a procedure, in ICL may be your best option. But waiting until you are 30 to have anything done would reduce your risk into the "moderate" category for LASIK and also give us time to find safer alternatives. Until then, I prefer glasses to contact lenses. Given your low prescription, you do not even need to wear your glasses all the time if you can function without them.

Your prescription is considered low in both eyes and based on the calculations alone, you might still qualify for LASIK although there are more factors to consider than just the corneal thickness and the prescription.  An irregular topography would be a red flag for potential post-LASIK problems. 

ICL provides better vision for patients with high prescriptions but since your prescriptions are low, the vision would be very similar.  Since ICL is an intraocular surgery, it would be difficult to argue that it is safer than LASIK or PRK and would probably not be more pleasant.

ICL is certainly more expensive, but cost should be secondary to safety, comfort, and vision quality.

If several surgeons are recommending ICL over LASIK or PRK, I would certainly lean in favor of an ICL but make certain that you have a full understanding of why they are making that recommendation.