LOL! Those lens they use to check his vision are funny. They remind me of the goggles that the young Anakin Skywalker wore in Star Wars I.
That's great they were able to come to the house to do the exam. Check with the Kent Association to see if they have tape machines that play books. I think it's the Library of Congress, here in the US, that makes available tape machines and books to folks who are blind, with other sight impairments, and even people who are dyslexic, and have difficulty reading.
One of my homeschool Mom friends has a son who is dyslexic, and she was able to get some of his textbooks on tape, and that made his learning much easier.
It will be border line as the pressure results are within the normal limits but if the last time the pressure test was taken he was much lower then the doctor may decide it wise to have a hospital appointment. Hopefully it will not be necessary as it is a major project to get him to the hospital. They will have to arrange a patient transport ambulance to collect him and return home after-wards and when he gets back the carers will need to be there to get him from the wheelchair back into bed.