An eyeball is what we call the ball-shaped part at the front of our eye. It's like a small, round camera that helps us see the world.
When people talk about an eyeball, they often mean the visible part of the eye. For example, you might get a black eye if someone hits your face and causes blood to collect around your eyeball. Or, if you're worried about someone's health, you might ask them to take care of their eyes by protecting their eyeballs from too much sun or computer screen time. You can also see pictures of human eyeballs in biology books or online - they're a fascinating part of our bodies!
The ball of the eye
To gauge, estimate or judge by eye, rather than measuring precisely; to look or glance at.
Example: A good cook can often just eyeball the correct quantities of ingredients.
