These are classic signs of transfer shock. Your acclimation method may or may not have been to blame, either; the petshop's tanks may be way off from where they should be chemically, or maybe yours is the one that's wrong, but there is almost certainly a big difference between them.
Blindness does occur in marine fishes, usually from poisoning or faulty diet. It takes several months to blind them from poor diet, so that's not my guess, assuming they're actually blind and not simply in shock.
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