If you questioned your vision during the infamous dress fiasco, this video may bring some of those feelings back.
ASAP Science, a YouTube channel that delivers "your weekly dose of fun and interesting science," created a hybrid image of Marilyn Monroe and Albert Einstein. One photo has low spatial frequency (Monroe) and the other has high spatial frequency (Einstein).
From far away, the image looks like a photo of Monroe, while up close it looks like Einstein. "Depending on how well you’re able to focus or pick up contrast," the video explains, Einstein at some point starts looking like Monroe as the image is moved farther and farther away.
So if you're having a hard time seeing Einstein, it may be time for a trip to the eye doctor.