seeing

Did you know if we divided our brains into five parts, a little more than three of those parts would be used for seeing?

Seeing takes a lot of brain power.

And heart power.

There’s a thin layer on the inside of the eyeball. 

It’s the retina. 

Nobody could see into the retina until microscopes were invented. 

When people looked inside the retina for the first time, they found millions of tiny cells and named them rods and cones. 

These rods and cones find rays of light and turn them into signals for our optic nerves. 

The optic nerves send the signals to the brain.

It turns them into pictures. 

Because of the way lenses work, the pictures are upside down. 

The brain turns them right side up. 

Isn’t that amazing?

I try to see the parts of the world that are upside down right side up.

And I try to see the parts of the world that are right side up upside down.

I try to see.

So I gently put my arm around the world and hold it close to me.