Is it Possible to Get LASIK Done After Having PRK
It may be possible to do LASIK after PRK, but it is much more common to enhance the PRK procedure with additional PRK.
Part of that decision would have to do with why your husband had PRK instead of LASIK to begin with. If it was because of thin corneas, then he definitely should have PRK for his enhancement.
It is possible. It would require a screening examinaton to determine candidacy. Another possibility would be another PRK procedure. The PRK procedure (or similar variants) is still commonly performed today.
It could be possible. The only way to know for sure is to see a doctor for consultation. It will depend on the prescription, the corneal thickness, the corneal curvature and some other factors. Simply having previous PRK does not exlcude you from LASIK.