Hmmm I am not entirely sure but it is measurable. Dyslexics have ttrouble with visual recall to some degree someone else could probably explain it better. There isn't a drug for it. Dyslexics, tend to turn their letters around write backwards like mirror writing at first once they start to begin to get it. You will notice too, if you read my posts that i make some very weird spelling errors. The reason is because as a result of being dyslexic, i had to find a different way to learn to read. I was about 10 years old when i learned to write my own first name. It took me an other year to stop reversing the letters when i wrote it. I have an iq of over 150... Well over. I am not trying to brag, but you must understand dyslexic people are often extremely intelligent. I have discovered with myself, that it takes me longer sometimes to figure out some things. Because, my brain works in such a way that first i have to figure out how it breaks apart and then reconstruct it. But such a way of thinking also provides me often with a far better understanding of things in the long run. If that makes any sense to you at all?
Most schools today teach a method of reading that is based on memorization of the visual image of a word. Most kids can learn like that because they are visual learners. But for someone, who has trouble recalling the visual or memorizing the word's "shape" it becomes harder becaquse dyslexics have to break everything down. Sound by sound and then rebuild it. I learned to read using a phonetic method. The Orton Guillingham Method. I highly reccommend it. It took time. But once i had learned to read i was about 3 years behind. I did 4 years of work in 1 year after i could read. I owe my teachers of that method everything that i am. Reading is the most crucial thing any human on this earth can learn. Mathematics who gives a crap? Science... who cares. But literacy.... Literacy is all important because anything you want to know, you can learn in your own good time in your own way at your own rate in accoedance with your own interests and you can pursue it as far as you want to go so long as you can read.
There are 3 types of dyslexia i don't recall the details anymore, because that part of my diagnosis, i could actually understand and accept. It makes sense to me from logical perspective i have evidence for it. I have old papers where i turned all my letters around. The dyslexic brain has to almost be re-wired ina sense, it requires a repetition of connecting each symbolic letter (atleast in my case) with a sound. I am an auditory learner though, I don't know what sor of learner your daughter is. Some people have to see things to learn them. Others have to hear them to learn them. Others have to touch them and be very hands on about them to learn them. That is why i like Orton Guillingham. It has it's visual auditory and kinesthetic parts.
Dyslexia,is very interesting because i am now studying epigraphy, (I am an archaeologist) In ancient egypt, (My focus) The ancient scribes had no wrong direction to write in. Hieroglyphs can go left to right or right to left. The "letters" or pictographs, can also face either diriction. They can also go up to down or down to up. There is no wrong way to write. Our society, has very concise rules we always write right to left and our letters face a certain direction. A good way to tell if someone is dyslexic is to watch their writing. And their spelling. If she has trouble connecting and memorizing the visual picture of a word and connecting it to the sound of the word she may need to learn how to build the word piece by piece. Which is where phonetics comes in. Which is why, you will see when i make a spelling error (if it isn't a typo) It is, wrong because, i can't recall how the word should look and so i spell it phonetically.
I was way above grade level too in alot of things when i was little and on a couple things so far below where i should be it wasn't even funny.
Stimulants, include coffee, Coffee and the medicine they would want to give would pretty much do the same thing. Only coffee has fewer side effects and is much safer. It is also milder. Dyslexia, leaves behind hard evidence in one's writing. To this day i still have to take every word i read apart phonetically. And i have to spell every word the same way. I read about 4 seconds slower than my mother does who does not have dyslexia. Because of that. The thing though, is i am a grown up. I have spent years and years and years perfecting this skill. This form of compensating, doesn't happen over night. Often with dyslexics it doesn't make sense for a long time then one day, something just clicks with the constant and continuous repetition of phonetics being grilling into their brain suddenly something clicks.... And they can start to read. The only reason i can write normally today and not turn my letters around. Is because, my teachers used to make me write my letters in a box of sand. And i had to trace it in sand the right way over and over and over and now i always go back to that sand in my mind when i write my letters and now it is extremely rare and i have to be either very ill or very tired or very very drunk to turn letters around. It has become seecond nature. My dyslexia doesn't hold me back at all. Beecause i found a way around it.
I am sure everyone wants to keep your daughter feeling good about herself here is what i personally would do if i had such a bright daughter as you have.
1. I would listen to my pediatrician and treat for lymes and see how that goes and see that treatment through to it's completion.
2. I would get a private tutor at home in a private place (What makes kids feel bad is having too much attention publicly spent on them. If other kids are not having the same attention, or learning the same way then she gets looked at by them funny and starts to see herself as being other than which soon becomes less than.) It is a good idea to avoid that scenario. So hire someone private to tutor her at home a few days a week and practice her reading with them perhaps someone trained in the orton guillingham method or maybe depending on her learning style there is some alternative method that might be better.
3. I don't know where you live but i am from MA, And there is a summer school program i know of and maybe you can find something similar where you are or use this one (if it is actually still around...) The Carrol School, i don't know how much it costs or if it or if there is something similar like it if there is financial aide, but it is best to make her appear as normal as possible to her peers. And in private, where it is not going to be a humiliation deal with the reading issue if she is pretty much otherwise normal bright and happy which is how it sounds. The summer school program i remember at Carrol, was actually fantastic. Small classes mornings dedicated to academics and afternoons slightly more geared towards more fun activities. I always loved photography there. I went there when i was a bit older than your daughter. Such a summer program might be a good way to ttry to deal with this so that she can keep up.
What else can i recommend??? Flash cards! Make a pack of flash cards, letters and their sounds, go through it with her every day atleast once if she is dyslexic especially if she is an auditory learner this will help her not immediately but, over a little time (and anything you try will take a little time) Help her "sound out" the words, letter by letter and syllable by syllable. There really isn't a drug for this sort of thing... Even the drugs they recommend for attention, don't actually do anything that in any way affect attention. For some though, an energy boost can help them to sustain their attention longer, but in cases of actual disinterest, what good does it do to fill them with drugs that don't extend attention but simoply offer the energy to do so should they have in cliniation to apply that extra energy boost to the task at hand? In the end there is really only 1 proper cure for lack of attention and sustained attention, a more interesting more attention grabbing learning environment.
That is where i would start if i were you i am not and you know way better than i do. You know her. I don't. But as a dyslexic person who made it through.... That is what i have to offer. You can't medicate someone into literacy it is just a clinical impossibility really... I don't know if your kid turns her letters around or not. I don't know what she does. Or how she is different if you describe more about it how she writes and how she reads and how she doesn't i *may* be able say weather or not it is likely to be dyslexia or if it is likely not but i can't say definitively. I am an archaeologist not an LD expert. But i am dyslexic and i do remember myself as a kid and i have seen some of my old papers and what not and i do recall the arduous process of learning to read and write... So maybe i can halp some atleast....
Good luck!