Simple Eye Exam Reveals How Much You Like Chocolate
Chocolate, nom nom nom Dreamstime What's that twinkle in your eye? Is it dopamine? You know when you give a child a candy bar, and they seem to get a little twinkle of joy in their eyes? Maybe that's just a look of gratitude-or maybe it's all the dopamine floating around their retinas. A new study shows it could be possible to use an eye test to observe the chemical response someone gets while chowing down on chocolate. The brain reacts to certain stimuli (for example, eating chocolate) by releasing dopamine. A lesser-known dopamine release also happens in the eye, in response to light exposure. Those two sources of dopamine are thought to be unrelated, but researchers from Drexel University recently tested that with a simple study. The Drexel team used electroretinography, or ERG, an electrode-based test that measures retinal response to light. When the study group was given a piece...