Ds is given use of the teachers laptop when required to read from the interactive white board, as he simply cannot see at all what is written on the board due to the glare and causing the words to fade out, he is extremely sensitive to bright lights, a sensory thing.
Ds has never used phonics (he knows phonics, he has just never used them to read) or sounding out words. He just memorises words, kind of sees it once, then just knows what it says for next time. He was reading like this at nursery, he was memorising and could read books. I was told 'this isn't reading', apparently a child cannot read, until they sound out. He would also read street signs, names of shops etc as we passed.
He does the same now and when you think about it, as adults we never sound out words as such when reading, we just know what they say.
Ds has always been obsessed with patterns, at a very young age being able to do complicated jigsaw puzzles without looking at the picture on the box, maybe due to his very high spatial ability. I am sure this how he reads, by patterns in words.
'large mass of text' and words being 'jumbled' could be due to tracking difficulties. Occolomotor deficiencies type 2 is exactly that. From ds eye specialist report 'his ability to follow lines as reading and writing was very inaccurate and this also made it very slow'. The test was ds being given a sheet of paper with lots of letters closely together and in different patterns and asked to name the letters.
He was given exercises to improve this. Also in school if he complains of words 'jumping' or being 'fuzzy' he is given enlarged text or use of a tracking magnifier.
So it might be worth getting tracking checked, as it is easily resolved.