Erlyne Osburn, an elementary teacher with a background in both public and private schools, is here to help you do everything you can to enhance your child's education. Writing is a difficult task for youngsters. In kindergarten some children are still undecided as to which hand they favor for writing and coloring. Writing not only requires good fine motor control, it also requires patience. Sometimes very bright children with a lot to say on a subject have a hard time recording their thoughts neatly.
Vision can affect the quality of writing.
If your daughter has some difficulty with her vision, it may stand to reason that she will struggle with writing. However, you also indicate that she is an advanced reader. This leads me to believe that her vision may not be as much of a factor as you may think. In order to determine if this is true, you may want to have your daughter's vision tested and see if the prescription for her glasses is appropriate. It is possible that this difficulty could be the result of a physical condition previously undiagnosed.