Well, aside from causing damage to your retina or optic nerve , the most common way to become colour blind is to be born that way. There is no way to bring on colour blindness on purpose without risking total blindness.

Can you make yourself go color blind?

Carbon monoxide or chemicals that contain lead are some common contributors. Color blindness is commonly known as a genetically inherited deficiency. However, chronic illness, severe accidents, medications, and contact with chemicals are all additional ways you can become color blind.

How do you pretend to be colorblind?

Here are a few ideas, which you could try out:
Show the plates in a different order. Some may have learned just the correct order and know, what they have to see and what not. Use the mixed plates. Include plates visible only to colorblind persons. Don’t use the Ishihara plates. Mix in some of your own plates.

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