I'm a senco, and through school I know there are services for support. Ours are through a special school outreach. He may have educational implications, even if there are no nhs services required/ offered. Ask the Senco, if they don't know, ask the LA.
They can advice on the little things. For example at our school they (for a child who lost sight in one eye):
-did a site survey, picked a few minor points such as steps in a shadowed area which we added paint lines to the edges (to help with depth perception) and reminders about floor clutter
-met staff one yearly and pre-empted lessons/ situations that might arise and cause difficulty (might sound obvious but for instance pointing out that in a busy game of rugby bumping was likely to be honestly accidental, avoiding wading in with a shout and a moan) or ensuring if sitting side-on to the board it was on his good side
-provided a listening ear for the child, outside school staff, on their visit to discuss worries/ concerns and ensure the child's voice was heard. Were very practical and a bit of a link for the child to here about others like him, even I believe arranged a meet-up with another child.
-Gave a few tips and tricks we wouldn't have thought of, little things like how to pour water from the jugs in the hall with impaired depth perception (rim touching spout). Tiny things really, but avoided problems before they occurred.
Whilst people are right above, it is a minor thing in a lot of ways, it's still worth asking the school for support. It's quite different as an adult who's in control of most things they do to deal with monocular vision, compared to a child in a busy school. As a adult you'd simply move if you couldn't see, for a child who's blind in one eye getting a chair side on to the board on their blind side allocated to them in the start of the year seating plan is a nightmare. Classrooms can have a culture of 'be quiet and get on with it' or some children feel embarrassed to speak up, the silliest things get missed at times.