Ever wondered why we are not plunged into intermittent darkness when we blink? Researchers in Singapore may have the answer. It is because our brain works extra hard to stabilise our vision without which our surroundings would appear shadowy erratic and jittery after we blink a study has showed. Blinking lubricates dry eyes and protects them from irritants. However when we blink our eyeballs roll back in their sockets and do not always return to the same spot when we reopen our eyes. This misalignment prompts the brain to activate the eye muscles to realign our vision the researchers said.