Flight attendant shares how passengers are used to ensure safety without realising

According to Aero Corner, opening the shades helps the eyes adjust to the outdoor lighting conditions.

In the case of an emergency, where passengers might have to evacuate the plane quickly, it is much safer if their eyes have already adapted to the outdoor lighting.

Without this integral step, they may not be totally aware of their surroundings.

But while passengers are extremely useful in the rare event of an emergency during take-off or landing, their main priority can still be relaxing and enjoying the flight.

source: express.co.uk