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Hyvärinen L, 1999, "Visual perception in 'low vision'" Perception 28(12) 1533 – 1537
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Visual perception in 'low vision'

Lea Hyvärinen

Received 19 October 1998, in revised form 20 July 1999

Abstract. 'Low vision' has an international classification as an impairment of vision that is defined by loss of visual acuity and the size of the visual field. Functional classification that would depict capability to use vision in different activities has not yet been agreed upon. Abnormal visual information leads to changes in visual perception, and brain-damage-related visual impairment may alter or prevent one or several cognitive visual functions. Abnormal visual perception opens a window into brain mechanisms that the psychophysicists otherwise do not have. Together with clinicians, psychophysicists can help visually impaired persons to understand the nature of their disability by thoroughly studying the nature of the altered image and the profile of cognitive visual functions.

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