Upper level: b229 Seeing and related functions, other specified and unspecified
Sensory functions relating to sensing the presence of light and sensing the form, size, shape and colour of the visual stimuli.
Inclusions: visual acuity functions; visual field functions; quality of vision; functions of sensing light and colour, visual acuity of distant and near vision, monocular and binocular vision; visual picture quality; impairments such as myopia, hypermetropia, astigmatism, hemianopia, colour-blindness, tunnel vision, central and peripheral scotoma, diplopia, night blindness and impaired adaptability to light
Exclusion: perceptual functions (b156)
Lower livel: