I clearly wrote my response to you without absorbing all that was in you messages. I'm so sorry. Before needing to travel to see a neuro-ophthamologist perhaps you or your child's Dr. could write up a concise history and results of her evaluations and mail it to the head of several academic, pediatric neurology or neuro ophthamology departments asking for direction or advice. UK, Scotland, Europe, US - Wherever you think you could reasonably travel.
I have done this when I was at a loss and been rewarded with many fine, helpful answers. At least if some express an interest in seeing her you would know where to travel to. You would think people like this would be too busy to respond, but I received many compassionate and thoughtful answers. In all reality your physician would probably get the best reception. I could not know if they answered me merely because I wrote, or that there was an MD after my name.
Her problem, though worsening, is 3 years old, and you probably have several weeks to await an answer. Mine came in over about a 3 month period. In your communication emphasize that the problem is worsening. In the meantime, she needs a new MRI w and w/o contrast of the brain (and possibly cervical spine). Much can change in a 3 year period. Has the neuro seen her recently? If not then another eval is warranted.
I do have a question. What happens during these episodes of visual distortion? Can she communicate? Do you see eye-blinking or movement of her lips? Does she ever seem to lose time (eg. lose track of a conversation)? I'm thinking about "absence seizures" which can occur dozens to hundreds of times a day and really mess up a child's life. They may be only seconds long, but the child's attention usually drops out during them. They do not fall or lose their posture. If walking, they sometimes continue walking during the seizure. They are common in childhood, usually quite treatable and, if uncomplicated by other neurological problems, often self-resolve by adulthood.. Has the neuro discussed this possibility or are your daughter's symptoms strictly limited to complaints of visual distortion?
If it seems like a possibility then a repeat EEG with hyperventilation is warranted. If there is any chance that she is having absence seizures then she should not do any activities which would be dangerous if her consciousness flickered (swimming, bike-riding, etc.)
Just a thought. There is also documented, I think, siezures in which there is a "aura" only which can be a visual disturbance.
I hope this post was more helpful. Quix
While these could be migraine-type events, their frequency is more concerning for something neurological. Has she had a MRI of the brain and cervical spine? Does she have headaches. How is her coordination? Has she had an EEG? I'm sick today, but I'll look for your answers soon. Quix