It’s a two way deal.
Once you’ve seen something, you can’t unsee it.
Equally, the interpretation of what you see is a product of things you’ve seen and experiences you’ve had so far.
Eye. Even the english word is a palindrome; it’s a two way deal.
You can use this image for free without changing it as long you include the attribution below:
Eye
by @bryanMMathers
is licenced under CC-BY-ND