The character could seek help from others, like mentors or friends, to overcome the loss of talent. Or perhaps it leads him on a journey of self-discovery to find his true potential.
Maybe the character undergoes a transformation and discovers new skills to compensate for the loss. Or, he could face internal struggles and self-doubt before finding a way to move forward.
He might first go into denial. He could keep trying to do the things he used to do with his powers, like swing from building to building, only to fall. Then he could start to rely on his intelligence more. Since Peter Parker is a smart guy, he'd use his scientific knowledge to try to find a way to get his powers back. He may also look for allies who can help him, like other superheroes or scientists.
At first, Percy would probably be angry and frustrated. Losing an eye is a huge deal. But he's also a determined person. He would start to practice with his remaining senses more intensively. He'd learn to listen more carefully for approaching enemies, feel the vibrations in the ground or water more acutely. He might also seek out some magical or medical help within the demigod world. There could be potions or spells that might help him either regain some vision or enhance his other senses to make up for the loss.
He might have used magic prosthetics. With the help of his friends like Hermione, who is brilliant at magic research, they could have found a way to create a magical arm that functions almost like a real one.
Keep yourself busy. Try to pick up a new hobby like painting or fishing. This can take your mind off the pain for a while. Also, consider seeing a therapist. They can help you work through your emotions in a more structured way and give you tools to deal with the loss in a healthy way.
She might ask for help from her friends in the Avengers. For instance, Natasha Romanoff could use her spy skills to quickly locate the glasses if they were just misplaced. Or she could enlist the help of Clint Barton, who has sharp eyesight and could potentially spot the glasses from a distance.
He might become more bitter. Losing his job at Hogwarts, which was a big part of his life, could make him feel betrayed and angry. He could isolate himself further from the wizarding community.
Naruto might become more introspective. He has always been action - oriented, but losing his arm could force him to think more about his actions and their consequences. For example, he may be more cautious when engaging in battles.
Well, when dealing with the pain of losing a best friend, you might find it helpful to focus on self - care. Take long baths, read good books, exercise. These things can boost your mood. It's also important to avoid isolating yourself completely. Try to attend social events, even if you don't feel like it at first. Over time, the pain will lessen, but it's a process. You have to be patient with yourself and keep moving forward.
There's 'One-Punch Man' where a character briefly loses his vision due to a powerful attack. But it's not a central plot point.
I try to keep myself busy. I focus on my work or hobbies. By doing this, I don't have much time to think about the loss of my best friend.