Changing our appearance for Halloween can mean changing a lot of things: hair color, skin color and eye color. However, if you have plans to alter you eye color this year, you might want to carefully reconsider that idea.

The FDA has warned that these counterfeit, "illegal" colored contact lenses are dangerous. They can cause serious eye injuries and even blindness.

Fox News has reported that government officials are currently in the midst of "Operation Double Mission," aiming to gather counterfeit or illegally imported lenses that are not FDA approved.

If you're determined to spice up your Halloween costume with some spooky contacts, officials recommend that you only buy your contacts from places that require a prescription, not pop-up Halloween stores, novelty shops, beauty stores or online vendors. 

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