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.
In fanfiction, without his glasses, Harry Potter might be seen as more vulnerable. His glasses are like a part of his identity, and without them, he may struggle more with seeing clearly, which could add an interesting layer to his character, like when he's in a dangerous situation and his blurry vision could lead to some unexpected plot twists.
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.
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.
Well, he might be stumbling around a lot. Without his glasses, Harry's vision is really poor. He could easily bump into things in the tunnel, like hidden magical creatures or even some sort of magical traps. Maybe he'd be using his other senses more, like his sense of hearing to detect any approaching danger.
Harry Potter could survive in the dungeon without his glasses by relying on his instincts. He has been in many dangerous situations before and has developed a good sense of danger. He could listen intently for any sounds that might indicate danger or a way out. Additionally, he could try to communicate with magical creatures in the dungeon. Some might be friendly and help him. And if there are any magical objects in the dungeon, he could potentially use them to his advantage. For instance, if there is a magical stone that enhances perception, he could use it to'see' better without his glasses.
He would probably be very disoriented. Without his glasses, Harry's vision is extremely poor. In the dungeon, which is likely to be dark and full of various obstacles, he might stumble around, bump into things, and have a hard time finding his way out. This could lead to some dangerous situations as he may accidentally trigger traps or run into unfriendly creatures.
A fanfiction like this could explore Harry's character in a new light. Usually, his glasses are a part of his iconic look. Without them, he's not only physically different but also psychologically. He might feel more exposed and less confident. This could change how he approaches situations with the Snatchers. For instance, he might be more hesitant in making decisions or using magic, which could have a big impact on the outcome of any encounters.
One possible fanfiction could be about Harry having trouble with his glasses after a spell goes wrong. He has to squint constantly to see clearly, and this leads to some comical situations at Hogwarts. For example, he mistakes a cat for a Kneazle during Care of Magical Creatures class.
Another plot could be that without his glasses, Harry is mistaken for someone else in the wizarding world. This leads to all sorts of comical and at the same time dangerous situations as he tries to figure out who this other person is and why they are important. He might get involved in a mystery that has to do with his doppelganger.
One idea could be that without his glasses, Harry has a hard time recognizing his friends at first. This leads to some comical misunderstandings. For example, he mistakes Ron for a first - year student and tries to give him advice. Another plot could be that his lack of glasses makes him more vulnerable in a duel because he can't see the spells coming clearly. It could add an extra layer of danger and suspense to the story.