eli5 How colourblind people recognise colours after using specially designed glasses?

Question

Watched few videos and make me ask this, how this glasses work?

In: 17

Answer 1

Here’s my basic understanding for a real eili5:

Look at a rainbow 🌈 roygbiv. You see all the colors, but it’s hard to pick out a single color because they all blend together.

Those glasses take some color away so you can see the separate colors better. So instead of roygbiv let’s say it’s ro g iv. You now have better separation between colors and can pick out a specific color better.

The glasses don’t take out whole colors, just small segments of the color spectrum but hopefully you get the idea.