This expanded Third Edition is designed to provide a foundation for a better understanding of the structure and function of the eye and common eye disorders in children, and approaches to assess and enable students with low vision to maximize their visual learning in educational programs. The book is primarily designed for students who are preparing to be teachers of children with visual impairments and practicing teachers who want to update their knowledge concerning children with low vision. It is also intended for use by orientation and mobility instructors, special education and regular classroom teachers, support personnel, and parents who desire to know more about the special needs of children with visual impairments. Major topics include structure and function of the eye, growth and visual development of the eye, evaluating the visual system, optical and ocular motility defects, external diseases, internal diseases, vision screening, the visual environment, low vision devices, and assessment of functional vision. Additional resources include a very helpful appendix and a comprehensive glossary. The text is presented in an unusually clear manner that gives teachers, mental health, social service, and allied health professions, as well as parents, a firm grasp of vision, its disorders, and its connection with education.