Optical illusions are a lot of fun, particularly when they’re based on colour. Ones such as this, posted by Dean Jackson on TikTok, is a great one that shows how our brain tricks our eyes into seeing colour that isn’t really there. This particular video starts off as a black-and-white image of a lady which then has a red filter placed over it, except for the eyes. Suddenly, we now see her eyes as blue.
Except they’re not really blue. They’re still grey. Our brain has tricked us into thinking that they’re blue based on the warmth of that red filter. It’s an interesting quirk of our brains that allows us to see beyond colour inconsistencies and fill in gaps for information that isn’t really there. A quirk that has real implications for photographers and filmmakers, especially when it comes to colour correction.
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