Your eyes help you see the world in all its beauty. Although an eyeball is pretty small — the size of a ping-pong ball — it hosts more than 2 million working parts. Human eyes appeared long before modern gadgets and lifestyle habits were invented, so you're giving your eyes a pretty hard time now with all the technology. That's why you need to take good care of them - and give them regular workouts. Try these 8 simple but effective exercises to keep your vision sharp, and your eyes - healthy. 

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