Eyewear could cut jet lag

Jet lag may soon be a thing of the past thanks to new eyewear which helps reset the body's internal clock.

Developed at Australia's Flinders University after 25 years of sleep research, the Re-Timer glasses have been commercially launched this month. The new device, available online for A$274, works by emitting soft green light into the user's eyes.

Psychologist professor Leon Lack, the device's chief inventor, said the light stimulates the part of the brain responsible for regulating the 24-hour body clock.

'Body clocks or circadian rhythms influence the timing of all our sleeping and waking patterns, alertness, performance levels and metabolism. Photoreceptors in our eyes detect sunlight, signal our brain to be awake and alert, and set our rhythms accordingly. These rhythms vary regularly over a 24-hour cycle.