Well, perhaps Harry gets his glasses broken during a battle with Death Eaters. In this disordered world without his clear vision, he has to use his magic in different ways. He might use a spell to enhance his other senses, like a super - hearing spell. This would allow him to detect approaching enemies, but it also makes him more sensitive to all the noises in Hogwarts, which can be overwhelming. And he would have to rely on his friends even more to get around and complete tasks.
A fanfiction could have Harry waking up one day in a disordered world where his glasses are missing. He soon realizes that the world around him is not as he remembers. The corridors of Hogwarts are all jumbled up, and he can't see clearly without his glasses. As he tries to find his way, he discovers that there are hidden secrets in the school that are only visible when one's vision is impaired. He teams up with some new and old friends to explore these secrets while also trying to find his glasses and restore order to the world.
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.
Well, perhaps in this fanfiction, Harry could be imprisoned by some dark wizards. Without his glasses, he'd be at a great disadvantage, relying more on his other senses and magical instincts. Maybe he uses his Parseltongue ability to communicate with a snake in the cell to help him escape.
In a 'Harry Potter without glasses brawl' fanfiction, it could start during a Quidditch match. Without his glasses, Harry can't see clearly. He thinks an opposing team's player is trying to cheat in a really aggressive way and he jumps into a fight mid - air. This could lead to a huge brawl between the two teams. And the Ministry of Magic might get involved later to sort out the mess.
One possible plot could be that Harry is captured by some dark wizards who know his power lies in his eyes (with his glasses being a symbol of his clear - sightedness in magic). They cage him up to weaken him, perhaps trying to prevent him from seeing certain magical signs or spells. Without his glasses, he's disoriented at first but then uses his other senses and inner magic strength to start fighting back.
Perhaps in this fanfiction, Harry is in a cage as part of a magical experiment. Some rogue wizards are trying to study how a wizard's magic is affected without their usual aids, like Harry's glasses. In the cage, Harry discovers new aspects of his magic that he didn't know before. He could start to manipulate the magical energy around him in different ways, even without clear vision, and eventually break free from the cage and confront those who put him there.
In this fanfiction, Harry without his glasses could be in a situation where he is forced to rely on his friends more when dealing with Horcruxes. His vision impairment without glasses makes it difficult for him to be as independent as he used to be. So, Hermione and Ron play a more crucial role. For example, when they are searching for a Horcrux in a dark and dangerous place, Harry has to trust their descriptions completely. And as they progress, Harry discovers that the Horcruxes are affecting his vision in a magical way, and he has to find a way to break this spell while still trying to destroy the Horcruxes.
One possible plot could be that Harry, without his glasses and drunk, stumbles around Hogwarts in a daze. He might accidentally end up in a restricted area, like the Forbidden Forest. Maybe he has some misadventures with the magical creatures there, all while being in a drunken state and unable to see clearly. His friends would then have to go and find him.
The plot could involve Harry using his magic in a different way. Since he can't see clearly, he might have to focus more on wandless magic or non - visual spells. For example, he could be trying to sense the magical energy in the cell to find weak points in the walls or barriers. And perhaps there are other prisoners in the cell with him who he has to interact with, and without his glasses, misidentifying them at first could lead to some interesting plot twists.
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.
He might end up in a place where he can't see clearly without his glasses and struggles to find his way. For example, he could be in a dark forest where he stumbles around, trying to figure out where he is and how to get back. Without his glasses, his magical abilities might also be affected in some way, like his spell - casting accuracy.