How to explain dyslexia to a ten year old

[ThisMorningWentBadly]

DC1 has recently been diagnosed with dyslexia. Please could I have some help with how best to explain it to him?

He is very bright and will remember exactly what he is told so I feel i’ve got one shot at this and want to get it right.

I bought a few simple books about Dyslexia and read bits of them to my ds when he was diagnosed age 7. I think it helped him to understand.