An article at BBC News tells us that wearing sunglasses can reduce jet lag.
Scientists in Edinburgh have found that people can adjust their body clocks when traveling to different time zones by altering their light patterns.Jet lag, which causes feelings of sleepiness and muscle inefficiency, is affected by the biological clock.
So, by wearing sunglasses during your long flights you help your biological clock adjust? Sounds like it's worth a shot. Have any Lifehacker readers tried this?
Sunglasses put jet lag in shade [BBC News]