Low Incidence Disabilities Autism- a range of conditions that challenge social behaviors, communication, and repetitive behaviors. Visually Impaired- unable to see because of injury, disease, or a congenital condition. Hearing Impaired- partial or total loss of hearing in one or both ears. Comparisons & Modifications A utism can affect the ability to speak or communicate. Most autistic individuals have not lost their vision or hearing. It is not caused by injury, disease, or a congenital condition [although research continues on its actual cause]. Students may need additional services such as speech for communication needs, and occupational therapy to address fine motor skills, and sensory issues. V isual Impairment is caused by injury, disease or a congenital condition. It does not affect hearing nor is it a result of autism. Students may need specialied braille training, assistive technology, and/or services for the blind in order to teach them how to c