If you've ever raised chickens, no doubt you've seen how they cock their heads from one side to the other. Perhaps their eyes don't allow the best view straight on; after all, their faces are so pointy, they end in a beak! Or maybe - like me - they have a "good" eye and a "bad" eye (without corrective lenses, my vision is 20/400 in my legally blind left eye). So, perhaps chickens check things out with a far-away eye and a close-up eye, just like me - but unlike me - they must roll their entire head from side to side to size things up. Now I know a chicken has a tiny little head and a tiny little brain perhaps the size of a pea. My brain has to switch from the right lobe (eye) to the left lobe (eye)to "decide" which image to process. Do chicken brains have lobes?
Split-pea takes on a whole new meaning.
Giving 'em the eye, 16 x 20, acrylic on canvas

My two disparate eyes send wildly different images to my brain - one much more in focus than the other, depending upon distance. I can almost
feel my brain switching eyes much as one shift gears:
pause, shift, go. Most of the time this happens subconsciously, but there are times when this becomes uncomfortable - as when one's focus shifts from an entire room, to friends across the table, to the small print on a menu. Because the lenses in my glasses are so different, the size of the corrected images differs enough so that once again my brain must choose the best (
sharpest, clearest, most meaningful) image. I usually just remove my glasses, thus eliminating distance vision - and making the near (left eye view) world of friends and menus the only options available .
I read with my (bad) left eye, too. Even though I am distance blind in that eye, my close focus is superb - vastly better than that of my astigmatic right eye. So whenever I read, or do closeup work on a painting, I'm lenses free. But if I need to walk about or look out of the windows, I must grab my glasses once again.
Sometimes I think my extreme visual orientation is precisely because of my impaired vision. I value that which I can see more than anything, because I know that without corrective lenses, I would be severely handicapped. I don't want to miss out on the world around me, so I look and look and look until I can see clearly...