Riddles about the Eyes

There are many riddles about the human body, especially the eyes.

Two sisters sit at the upstairs windows;

They look around but cannot see each other.

I visit everyone, but no one can visit me.

What are the birds that graze on a place not near?

Two nuts cross a river.

I cast my arrow in the daytime, it went far off;

I cast my arrow at night; it did not go far.

Two arrows with black wings reach wherever they wish.

 

Wikipedia