Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion 31 May 2017 Ever wonder why the lights don’t dim or flicker every time we blink? Ever wonder why the lights don’t dim or flicker every time we blink? A new study conducted by a team of international scientists indicates that the brain constantly repositions the eyeballs to keep them focused on what they are looking at even though the eyelids close every few seconds. "Our eye muscles are quite sluggish and imprecise, so the brain needs to constantly adapt its motor signals to make sure our eyes are pointing where they're supposed to," says lead author Gerrit Maus. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Lifestyle US soldier receives world's first penis and scrotum transplant Diet and nutrition Africa needs to address multiple food issues to end hunger News Your neighbour's backyard chickens might carry salmonella risk Diet and nutrition 10 of the most extreme and dangerous weight-loss methods News ‘I feel so honoured I was able to help save his life’: Daughter donates kidney to dying father News Mysterious illness turns energetic pole dancer into a fatigued ‘gran’ From our sponsors WIN a R2 000 beauty voucher! Understanding diabetes self-management Fed up with the Phlemings? Let’s chat diabetes and erectile dysfunction Live healthier FYI » When the flu turns deadly Why the flu makes you feel so miserable Could a deadly flu strain hit SA this winter? Following an intense flu season in the US and UK, should we be worried about our own upcoming flu season? Alcohol and acne » Dagga vs alcohol: Which is worse? SEE: Why you are drinking more alcohol than you realise Does alcohol cause acne? Some foods can be a trigger for acne, but what about alcohol? Dermatologist Dr Nerissa Moodley weighs in.