Someone else might be able to read your spellbook to you
As you correctly noticed, a blinded wizard can probably not read his own spellbook. If others want to cast the spells from your spellbook, they would have to be a wizard and spend time "deciphering the unique system of notation used by the wizard who wrote it". However nothing about a spellbook explicitly prevents others from reading it and describing its contents to you. Since you know your notation, if someone else describes you the contents of the spellbook, you could get enough information to memorize the incantations and gestures. They wouldn't understand what they are reading, but they don't have to.
Notably, while RAW nothing prevents you to study your spellbook through others reading it to you, nothing supports it either. The rules do not require you to see the book yourself but they require you to study it. So this would be a discussion that you should have with your DM. It would probably cost more time than the usual time to study the spellbook and it might require some intelligence checks.
As a real life reference, there are games where one person has a bomb in front of them and others have a manual how to defuse the bomb but they cannot see the bomb. Now the bomb person has to describe them what he sees and the listeners have to help him defuse it. It has Cyrillic and Greek and Chinese alphabets as part of the riddles. In our case the person reading them and the person listening both do not know these alphabets, but yet they manage to defuse the bomb. It costs time sure, but it's possible. For example "Keep talking and nobody explodes" or "Escape the BOOM!".