i've just found out that i have visual dyslexia, but i dont suffer from dyslexia itself, is it normal 2 be suffering from visual dyslexia?

i dont have all the symptoms, my main symptom is when reading off a dark background ( i.e black background, white text) the writing goes up 2 show me the same word i've just red, like double vision, but the images r fine.
i wear glasses 4 being short sighted anyway.
my eyes r senstive 2 sunlight as well and i find when i'm tired it's worst.

i get a tint on my glasses 2moz, hopefully it'll help me :)