If you're a frequent flyer, you've probably heard a cabin crew member say this: “Before landing, please ensure that your window blinds are raised…” But why is it necessary? Aviation expert John Walton explains.

Why are we asked to raise airplane window shades? 

It’s not just to give you a better view out of the window on landing, although that’s a side benefit.

As with many of the things we must do on flights, it’s for safety.

Opening that blind is a good plan for a combination of reasons. First of all, it’ll give your eyes time to adjust to the ...