Reed offered himself to revert The Thing's condition plenty of times, to which he refused.
What about Alicia's blindness?
Did he offer as well and she refused it?
Or is it something beyond their capability?
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Reed and the Fantastic Four have made at least one effort to restore her sight, in Fantastic Four Vol.1 #19
The loss of her eyesight (as a result of a chemical explosion) is evidently not curable by any means at Reed's disposal. They try to locate a radioactive herb with restorative properties from the past.
Unfortunately it doesn't make it into the future.