The Associate is required to have close
visual acuity including color, depth perception, and field of vision to perform an activity, such as
assessing patients, preparing and analyzing data and figures; transcribing; viewing a computer terminal; or extensive reading.
Future research may gain further by
assessing even more specific aspects of
visual function objectively (e.g., impairment in depth perception, extreme contrast or brightness sensitivity in addition to
visual acuity as
assessed in NSHAP) and subjectively (e.g., self - reported trouble with reading newspaper print and recognizing people at a small distance in addition to the global assessment of one's vision as
assessed in NSHAP) in the study of the effects of vision on quality of life and the capacity of a good marriage to alter these effects.