FIGURE 1-4 Aspects of vision loss.

The Organ The Person Aspects: Structural change, anatomical change Functional change at the organ level Skills, abilities of the individual Social, economic consequences Neutral Terms Health condition Organ function Skills, abilities Social participation Loss, limitation Disorder, injury Impairment Disability Handicap ICIDH –80 Disorder Impairment Disability Handicap ICIDH-2 Structural change Functional change, impairment Activity + performance code Participation + performance code   Application to Vision Visual functions Measured quantitatively e.g, visual acuity Functional vision* described qualitatively e.g., reading ability

* Visual task performance in our framework Source: Adapted from International Society for Low Vision Research and Rehabilitation, (1999).

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