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Your corneas certainly are substantially thinner thannormal. LASIK would not be a goodoption. If your corneal topographyis completely normal, you could have PRK surgery. There is no clear consensus on how thin a cornea can safelybe after PRK, but in my experience 400 microns has not caused any problems likeectasia (bulging of the cornea from being left too thin after LASIK orPRK). At 12-14 microns per diopterof treatment (depending on laser used, and treatment zone), your ablation depthwould be 54 to 66 microns. The ICL would be a perfectly good option, though it is a bitmore expensive and slightly more invasive. If there is ANY question as to whether your cornealtopography is normal or not, I would opt for the ICL. Otherwise, as far as which is better, both are equally goodin my opinion.
If your elevation topography is normal you may have PRK. The option of ICL is also one to consider should there be any issues with you topographic evaluation. I would, however, not advise LASIK in this circumstance. Some patient who elect for laser vision correction in the face of thin corneas will elect to combine it with collagen cross linking. This is a technology that can strengthen the cornea and thus make laser surgery safer.
Inflammation is a normal response to the laser energy applied to your cornea. Different people have different inflammatory responses. It sounds like you had a pretty standard steroid taper, but in hindsight it may have been too rapid a taper for you. Going back on steroids is the proper...
Ghosting one month after PRK can be caused by many things. Most commonly would be residual refractive error, ie some remaining astigmatism. This can be easily measured by your doctor. If this is the case, typically surgeons wait 3-6 months to retreat with more PRK. Other possible causes...
Eight days is far too soon to know what your final visual result will be following PRK. Most changes occur within the first 3 months, and it could take up to 6 months for full stabilization of vision. Be patient and allow your eye to heal. It is entirely possible for you to be 20/150 a week...