The Torah (Shemos 13:7) famously tells us:
וְלֹֽא־יֵרָאֶ֨ה לְךָ֜ חָמֵ֗ץ
Chametz shall not be seen in your possession.
What happens if the homeowner is blind? Do they have to hide away/lock up the chametz, or can they leave them as they are normally, if they anyway cannot see them?
As per my comment, the starting point would seemingly be the two contrasting opinions of the Rambam, and the Rosh.
Rambam as explained in the Kesef Mishneh, hilchos chametz umatzah 3:1 that a person does not transgress the prohibition if he has chametz hidden in a place where it cannot be seen.
והנראה בעיני דלא יראה לא משמע אלא כשהוא נראה לעינים דוקא וכן משמע בספר המצות מצוה ר' ומצוה ר"א.
And it appears in my eyes that the transgression of not seeing chametz is only implied when one sees it specifically with their eyes, and this is similarly implied in (Rambam's) Sefer HaMitzvos #200 and #201
The Rosh on Pesachim 1:9 disagrees with Rambam and points out that the Torah does not say "You should not see chametz (on Pesach)" but rather "chametz should not be seen". This means that as long as it is in a place where it could be seen, this commandment is being violated.
ואע"פ שאינו רואה דהא לא כתיב לא תראה חמץ אלא לא יראה משמע לא יהא לך חמץ במקום הראוי לראיה
Thankfully, after a bit of digging, I came across the Minchas Chinuch 20:1 who applies these two differing views to a case of a blind person. Rambam would say that he has not transgressed anything as he can't see the chametz. The Rosh, however, would maintain that it is sufficient in that, theoretically it can be seen. The Minchas Chinuch then reconsiders and concludes that the Rambam would conceivably agree with the Rosh that as the chametz are completely visible, the fact that the blind owner cannot see it is irrelevant and he has transgressed the commandment.
