Well, it can vary depending on the comic series. Sometimes a character's vision comes back due to a scientific breakthrough or a supernatural intervention. Other times, it could be a result of a heroic sacrifice or a deal with a powerful entity.
Superman comes back to life in comics by way of unexpected twists. Maybe a hidden power within him activates, or a group of allies work together to bring him back. The methods are as creative as the comic writers' imaginations.
Superman often comes back through some powerful cosmic or magical intervention. Sometimes, it involves the manipulation of energy or a complex plot device.
Superman's resurrection in the comics often involves advanced technology, magic, or the combined efforts of other superheroes. Sometimes, it's a plot twist that defies normal expectations.
Well, Captain America makes his comeback in the comics thanks to a series of events. It could be a result of a hidden power or a secret mission that leads to his resurrection. The writers really pulled out all the stops to bring him back in an exciting way.