are pave-set luxury crystals with a fashionable design theme.
But the fact is that humans can do this in the blink
of an eye.
15-17) D1 and D2 agonists and antagonists, which can selectively enhance and block central dopaminergic activity, (18-20) have been shown to increase and decrease the blink
Dr Tamami Nakano, of Tokyo University, said: "Our results suggest humans share a mechanism for controlling the timing of blinks
that searches for the appropriate timing to prevent the loss of critical information from the flow of visual information.
They used the timing of those blinks
as a reference, and then played the volunteers the same clip again and measured whether the eye blinks
occurred at the same time as the reference blinks
People tend to squint when they read a book or a computer display, and that squinting makes the blink
rate go way down," points out James Sheedy, professor of optometry.
She added: "Transiently suppressing the brain areas involved in visual awareness during blinks
may be a neural mechanism for preventing the brain from becoming aware of the eyelid sweeping down over the pupil during a blink
and the world going dark.
Many Big Brother viewers thought dizzy blonde Helen Adams was mindless when she famously said: "I like blinking, I do" - but now neurologists at University College London have found blinks
shut the brain down for a total of nine days a year.
On average, a person blinks
eight times a minute, nearly 8,000 times a day.
On another wall we meet Fiona (This is Fiona, 2000), who blinks
, smiles at us, blinks
, raises her eyebrows inquisitively, and blinks
A data table should include all the variables in your experiment: The independent variable, or variable you change on purpose (for example, the type of activity for the "Eye Spy Test"), and your dependent variable--the variable that responds when you change the independent variable (number of blinks
For example, said Sheedy, studies show that people blink
much less frequently when working on computers - one study found the normal blink
rate to be 22 blinks
per minute and the computer-work blink
rate to be just seven blinks
While we blink
an average of 20 times per minute--15,000 times each day--four blinks
per minute are sufficient to keep the eyes moist and clean.
Suppressing the brain areas involved in visual awareness during blinks
may be a mechanism for preventing the brain from becoming aware of the eyelid sweeping down.
Not far behind are ITN's sexy newsreader Katie Derham, who blinks