A friend of mine is a dyslexia therapist. She told me a couple of interesting things. For example she told me that there is a specific note reading dyslexia. And indeed that confirms my experience. I even think that note reading dyslexia might be way more frequent than "normal" dyslexia. She recommended me the Davis method. I have bought one book by Ron Davis but not yet studied it completely. When I have I will post more.https://www.dyslexia.com/
Thank you thank you thank you pianowolfi. I have read Davis' book for my maths pupils and will now re-read it, for my sightreading....but can't find anything specific re note-reading dyslexia. More info from your friend would be of great interest
like putting a coloured bracelet on each hand and the matching coloured marker on the music score.