One possible fanfiction could be about Harry being wrongly imprisoned in Azkaban. Without his glasses, he has to rely more on his other senses. He might start to discover hidden magical abilities within himself that he didn't know before. Maybe he can sense the Dementors' approach in a different way and find a way to resist their influence without the use of Patronus charm, which could be a really interesting twist in the story.
A possible plot could be that Harry is framed and sent to Azkaban. Without his glasses, he struggles to see clearly. One day, he finds an old magical object in his cell. He tries to figure out what it is by using his other senses. As he explores it, he starts to unlock some of its secrets which could be the key to his escape or a way to expose the real culprits behind his false imprisonment.
Perhaps in this fanfiction, without his glasses, Harry's vision is magically enhanced in Azkaban in a different way. Maybe he starts to see auras or some sort of magical energy that was hidden from him before. This new vision could be related to the dark and gloomy atmosphere of Azkaban. He could use this new ability to find a way to escape or to help other prisoners. For instance, he might be able to see the weak points in the prison's magical defenses through these new 'visions' that his lack of glasses has somehow triggered.
Well, it could make his relationship with Hermione more protective. Hermione might worry more about Harry's well - being without his glasses in Azkaban. She could be constantly trying to find a way to get his glasses back or help him in other ways, like using magic to enhance his vision temporarily. This would strengthen their bond as she takes on a more caretaker role.
In this fanfiction, Harry might be on a ship escaping from some dark forces. Squinting without his glasses, he has to rely on his other senses more. His friends could be around him, trying to protect him while he struggles to see clearly. This situation could lead to some tense and exciting moments in the story.
In fanfiction, if Harry Potter were without glasses, it would likely have a significant impact on his character arc. His glasses are not just a visual accessory but also a symbol of his 'nerdy' or 'outsider' status at the start. Without them, he could be more integrated into the 'cool' crowd at Hogwarts. He might also be more daring in his adventures as he wouldn't have to worry about his glasses getting broken or lost during battles or dangerous situations. This could lead to a more confident and perhaps even a more flamboyant Harry Potter in the fan - created stories.
A fanfiction idea could be that without his glasses, Harry's world becomes a bit of a blur. He starts to rely more on his other senses. In the Forbidden Forest, this could be both dangerous and enlightening. He might be more attuned to the sounds and smells of the forest, but at the same time, he could easily walk into a dangerous area. His friends, Hermione and Ron, would have to be extra vigilant in protecting him. This new dynamic could change the relationships between them and lead to new adventures.
One possibility could be that in this fanfiction, Harry's glasses are some sort of magical anchor. Without them, he might accidentally slip into a different dimension. Maybe he was in the middle of a battle at Hogwarts, his glasses got knocked off, and suddenly he vanished. It could be that the glasses were enchanted by Dumbledore long ago to keep Harry in the 'right' magical space, and without them, he's lost in a sort of limbo.
Perhaps in the fanfiction, Harry discovers a new spell or a magical item that can temporarily enhance his vision without glasses. But there could be a catch, like it only works for a short time or has some side - effects. This would lead to a whole adventure of him trying to find a more permanent solution while also dealing with the normal challenges in the wizarding world.
Harry might survive in Azkaban because of his connection to his friends, even if they betrayed him. Their memories could give him the strength to hold on. And he may be able to use his magic in unique ways. He could draw on the positive emotions he has left, like his love for his parents, to create a shield against the Dementors. Plus, he may be constantly looking for a way to prove his innocence and that hope could keep him alive.