Will I ever stop thinking about how missing half of his sight might affect Suo and all the subtle systemic ableism he probably faces on the daily and has got used to.
It's just, the way his first instinct when introducing himself was to talk about his eye and give a made up explanation to avoid any and all questions made me think a lot of people previously asked about his eye constantly, probably in middle school, and probably back at Bankoku-Gai too.
He lost half of his vision shortly before entering middle school, going by flashbacks and what little we got from Nirei and Tsugeura, started middle school at a new place where he didn't know anyone (with the added possibility of facing xenophobia, which I think it's also why he didn't correct them on saying his name in the Japanese reading of the characters) and that must have been shitty as hell.
Medical patch means he was still healing from whatever caused that loss of vision, losing half of your field of vision means losing depth perception, means vertigo,means headaches and strain migraines, means your other eye hurting and straining constantly to compensate. It means a skewed depth perception.
Suo's dexterity at writing likely was affected, more regarding writing in a straight line or gauging distances... He likely had to retrain his martial arts skill set to learn to compensate, and if he ever knew how to draw semi decently or like any other regular kid, he probably gave up afterwards because of the depth perception issue.
Mocking his artistic skills feels harmless on the surface, until you realise he literally has a visual impairment.
Him not using screens much or looking at them much likely helps reduce eyestrain.
It's likely Suo got into fights at middle school outside and inside because of ableist people wanting to mess with him since he had a visible disability (that everyone seems to ignore now because he's insane at fighting). Explaining why nobody knows exactly who he fought in Makochi.
Also, whether its a scar and a dysfunctional eye or a scar and an empty eye socket, or just a product of a chemical burn to the retina, there's definitely side effects like pain from scars, phantom pain from the empty socked, possibility of discharge leaking... All in all, he has to take care of whatever is under. If his eye is there it could be just causing issues when uncovered because it's heavily damaged.
Suo is a martial artist, wearing an eye patch puts him at a disadvantage physically (specially at 12, which is how old he was when he started middle school) but also because he can be perceived as an easy target, being realistic the theories of a perfectly good eye that's just a different colour don't work, the theories of it covering just a scar with a functional eye don't either, congenital disability could have worked if they didn't mention it came from an accident and he actually wore a medical eyepatch at 12, either his eye got damaged badly or it just isn't there anymore.
I'd like to think either Hiragi or Umemiya might have approached Suo to ask if he needed any accomodations, but realistically Suo is so competent that I think people don't register he's disabled.
And with how averse he likely is to showing vulnerability, it's likely he just goes along with jokes about his drawing skills (which are probably along the vein of how he just can't be good at everything), maybe his handwriting not being as "prime and proper" as people expect of him, some of them might have thrown theories of what's actually under the eyepatch (which they might think innocuous but can definitely get annoying).
I do think Suo might actually not want to try videogames or arcade games due to depth perception (aside from likely having never played one before).
While his refusal to eat in public is probably tied to the situation at Bankoku-Gai, there's a possibility Suo doesn't like eating in public in general due to his depth perception (eating with a spoon while missing an eye is probably easier that chopsticks or even a fork, which might cause questions to be asked), he probably has the tea drinking motion ingrained in him though.
Suo might actually take to a more defensive style that relies on the enemy approaching himself first because it's easier to fight that way with his skewed depth perception.
Anyways, my brain is full of Suo thoughts and this is the reason I don't like fics pr jokes about the class trying to see what's under Suo's eyepatch or people saying that Suo has to take off his eyepatch in front of them as if he owes them that for not opening up before... It's mildly icky at best and downright insensitive at worst.
If we do see what's under Suo's eyepatch it's going to likely be a flashback of what happened that doesn't directly show the immediate aftermath, a private moment of current Suo taking it off in his own privacy and maybe Sakura and Nirei get to see it due to circumstances and don't make a big deal out of it.