Blind dog can't walk in the sun anymore / scared of light. any solutions?

That's my old grandpa dog and he's not fully blind but still blind. So he still sees stuff a little bit. Including the sun and as you can see in the vid he struggles with walking normal without being scared every 2 seconds.

He looks like he's scared of getting punches but noone in our house beats him dont worry.

Does anyone know this behavior from their dog and mabey can tell what to do to help that my dog isn't scared of the bright light anymore ?

I can't think of anything except sunglasses haha