Age-related decline in the ability to “take in” lot of information at a glance appears to be associated with people’s cognitive decline more generally, so could (one day, potentially) be a quick and cheap method of assessing mild cognitive impairment.
Mundasad, S. (2014). Visual processes ‘critical for sharp mind’. London: BBC Health News, August 4th 2014.
This relates to:
Ritchie, SJ. Tucker-Drob, EM. [and] Deary, IJ. (2014). A strong link between speed of visual discrimination and cognitive ageing. Current Biology. August 4th 2014, Vol.24(15), pp.R681-3. (Click here to view the PubMed abstract).