Well, in this fanfiction, without his glasses, Harry might struggle with basic things like finding his way around Hogwarts. As for Nagini, she could be a key element in a plot where Harry is trying to figure out Voldemort's next move. Maybe Nagini has some sort of connection to Harry's blurry vision, like she can manipulate it further to cause him trouble. Or perhaps Harry discovers a new magic that doesn't require his sight to combat Nagini when she attacks.
The fanfiction could be centered around a scenario where Harry loses his glasses during a battle and has to face Nagini. He might use his instincts more. Nagini, on the other hand, could be presented as a more complex character. She could have her own motives that are not just tied to Voldemort. Maybe she sees Harry without his glasses as an easier target, but Harry surprises her with his raw magical power that he has to tap into without the aid of his vision.
It could be a really interesting take. Maybe without his glasses, Harry has to rely more on his other senses like magic - enhanced hearing or something. And Nagini being there adds a whole new level of danger. It could be that Nagini is used by Voldemort to target Harry in a new way, since Harry can't see clearly. It might also show a side of Harry that is more vulnerable, and his relationship with Nagini could be explored in a very different way than in the original books, like she could be a sort of shadowy figure that he senses but can't quite make out without his glasses.
Harry could be at a significant disadvantage without his glasses. He might misjudge distances when Nagini attacks, making it more dangerous for him. However, this could also lead to the discovery of new magical abilities, like a form of magic - based echolocation. Nagini might be used by the dark forces to take advantage of Harry's impaired vision.
It could be really interesting. Maybe without his glasses, Harry would seem more vulnerable, and Malfoy might take advantage of that in a different way than in the original story. They could have more intense eye - to - eye confrontations that are different from the ones where Harry is hidden behind his glasses.
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.
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.
Well, without his glasses, Harry might rely more on his other senses. His magical instincts could be heightened. When dealing with the Snatchers, this could mean he'd be able to sense their dark magic more acutely. He could use this to his advantage, perhaps by using magic to disrupt their search for him. And the Snatchers might underestimate him because they think he's at a disadvantage without his glasses.
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.
One possible plot for a 'Harry Potter in prison without glasses' fanfiction could be that Voldemort or his followers have managed to frame Harry for a serious crime. In prison, without his glasses, Harry is constantly disoriented. He has to learn to adapt quickly. There could be a new character, perhaps a sympathetic prison guard or a fellow inmate who helps him get by. Harry could also discover some hidden magic within the prison walls that he can only access because he is in this vulnerable state without his glasses. This new magic could be the key to his escape and also to defeating Voldemort's plans in the long run.
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.