QUOTE(muse @ Mar 16 2008, 11:05 AM)

...Where you just don't seem to get any better.

I'm feeling particularly down this week. I am studying grade 6 piano, but I'm working on improving my sightreading and have been for probably over a couple of years.
...
If I had a sight reading test on one of my grade 6 pieces I would have passed because one of them I played semi ok the first time I played it. And yet, I can't play some grade 1 pieces first off.
more or less snap
have you had your eyes checked? I've been wingeing about my sightreading on these forums for years. HOWEVER I've just realised I have poor convergence of the left and right visual fields!!!!! This is NOT tested in routine eye examinations, at least, not to the level needed for music sightreading, and not in the UK. If I hold a pencil vertically 5 inches from tip of my nose and move it far right so that only my right eye can see it, and move it back to the front, I still see only one pencil. But if I do the same to the left and move it back, I get 2 pencils about 2 inches apart, and it is quite painful getting the images together quickly. If I blink then I suddenly get only one pencil.
This means that the right eye is dominant and that the brain supresses the image from the left when it can. When it can't, it sees blurry or double depending on the distance involved.
This explains ALL my symptoms and complaints! Bass clef swimming about only when trying to read 2 clefs. Losing my place, becoming disoriented, rhythms stuttering, unable to look ahead etc...unless I can guess correctly, explaining the random nature of success.
Now reading english prose isn't affected because english is a highly redundant language: you can guess correctly from seeing only the first and last letters of a word and its place in a sentence. BUT music notation is definitely not redundant: you have to clearly see every little thing. Reading complex music at speed triggers the double view leading to confusion, and if I try to keep doing it, headaches and nausea. You need both eyes working together to a very high level of resolution. (I think ithis is why coloured notes helped me, as it introduced redundancy).
When I figure out how to correct/improve it, I'll make a post. If anyone reads this and has a suggestion, please post it!
At the moment, I'm sitting as far from the keys as I can, placing the score in front of the right eye, and carefully scanning a line or 2 of music making a *mental map* of it: all the things the sightreading books recommend like scale and arpeggio bits, where accidentals occur, the rhythm etc etc so that I can guess better. I can then play something correctly albeit slowly. I'm a long way from the 30 second scan being enough at grade 6 level sightreading BUT this is such an improvement over even a week ago that I actually feel there is hope for me yet.