Visual learning disorder, what could cause this? genetics? environmental factors?

Non-verbal learning: Disability is far less common than language-based ld's &is found in about 6% of students. Non-verbal learning disorders are brain-based, not eye-based. They may impact executive functions (reasoning, mental flexibility, problem-solving) as well as visual-perceptual &visual-motor tasks, whether isolated or as a manifestion of hydrocephalus, autistic spectrum disorder 1 &some genetic syndromes.