This chapter defines visual impairment, blindness and low vision and outlines some developmental implications of visual impairment. It looks at prevalence and causal factors. After considering identification and assessment of visual impairment the chapter examines provision including low vision devices and lighting, orientation and mobility, gaining rapid and efficient access to information, and reading using tactile methods.
Definitions of visual impairment, blindness and low vision
In this chapter, the term ‘visual impairment’ generally indicates a continuum of loss of sight, including blindness. Blindness describes a level of sight loss of children who depend mainly on tactile methods of learning. ‘Low ...