Writer claims there can be huge variations in visual imagery in the sighted.
"There is huge variation in outcomes around the country.
"There's huge variation in the amount of enzyme people have in their guts.
There was huge variation in service across the country that could sometimes seem like a postcode lottery, she said.
And yet, despite that, there is huge variation in the standards on offer [between schools], and a huge disengagement within the system, among some pupils.
While the rise in rates of obesity worldwide is blamed largely on diet and levels of physical activity, there is huge variation in how much weight people gain.
There is huge variation in fuel efficiency between transatlantic airlines, with British Airways and Lufthansa emitting 51% more carbon dioxide than the cleanest flyers, according to a report by the organisation that revealed the VW test-rigging scandal.
There is huge variation in demand for greater tax and spending powers across the UK, from Scotland where a majority of voters favour enhanced fiscal autonomy, to most of the English regions, where there is little appetite for any change.
While teaching hours have hardly increased, undergraduates are putting in 79 minutes more independent study every week than they did in 2006 and there is huge variation in the hours they have to work to get a degree at different universities, the study found.
Third, there is huge variation in the number of categories used in such studies.
