Imagination (2007) on Netflix

Plot summary

Anna and Sarah Woodruff are twin sisters, about ten years old. Anna has Asperger's Syndrome, an autism spectrum disorder, and Sarah, who is going blind, has visions that map closely onto her sister's. Dr. Reineger, a child neuro-psychologist, tells their parents the girls are intelligent and deeply involved in an imagination of their own, though he cannot say why Sarah's visions match Anna's. Their father leaves the family, and the sisters sink further into the world they have made. Live action, stop motion and other animation techniques show that world from the inside: strange creatures, changing times and places, and a primordial forest of white elms covered in eyes.