Well, it could be that Draco steals Harry's glasses as a prank. Maybe he wants to embarrass Harry in front of their classmates. He might hide the glasses in a secret place in Hogwarts, like in an old unused classroom, and Harry has to search for them while dealing with his blurry vision.
One possible reason could be to annoy Harry. Draco is often portrayed as a bully in the Harry Potter series, and stealing Harry's glasses is a way to make his life difficult. It could also be a power play, showing that Draco can take something important from Harry.
Well, Harry could also be more level - headed. He might try to figure out Draco's motive first. Since he's used to Draco's antics, he could choose to outwit Draco instead of getting into a physical or shouting match. He could use magic in a clever way to get his glasses back without causing too much of a scene.
Harry could be really angry. He might immediately try to get his glasses back, using some basic spells or just by physically trying to grab them from Draco. He'd be frustrated that Draco is always causing trouble for him.
One possible motive could be that Draco wants to annoy Harry. Stealing his glasses is a petty way to get under his skin. It's a simple act of mischief that Draco might think is funny. Another reason could be that Draco is jealous of Harry. By taking something so important as his glasses, he feels like he has some power over Harry.
I'm not sure if there is such a specific fanfiction with that exact title. Fanfiction can cover a vast range of themes and ideas, but this seems like a rather unique and perhaps not very common one. It might be difficult to find, if it exists at all.
In some fanfictions, Draco might use his knowledge of potions to heal Harry. He could brew a special healing potion using his skills learned at Hogwarts. For example, a modified version of the Essence of Dittany which is known for its wound - healing properties.
It could be an amateur writer who is just having fun with the characters. Maybe someone who really likes to create out - of - the - box scenarios involving these two characters.
In the 'Draco steals Jarrys underwear fanfiction', it could be that Draco is being controlled by a spell or some dark magic. He has no choice but to steal Jarrys' underwear, and this sets off a chain of events in the wizarding world. Jarrys then has to figure out how to get his underwear back and break the spell on Draco.