I had cataract surgery on my right eye many years ago. The Docs replaced the bad lens with an artificial one, and I’ve had 20:20 distant vision in that eye ever since. Meanwhile, a cataract in my left eye has been getting worse. That eye still works, especially up close when I leave out its contact lens that corrects for distant vision. In effect, without wearing the contact and then wearing the specs that then correct both eyes for up-close vision, I have usable vision without needing to bother with the contact or the glasses.
So, around my apartment, I seldom need to wear the contact or my glasses. Since my right eye with its 20:20 distant vision was the corrected one, it had long been my habit to use that eye to peep through the spy-hole in my apartment’s front door to see who or what lurked on the other side. The result was a blurry but usable view. I’m not sure why, but one day last fall I used my cataract-dimmed left eye to peep through the spy hole. Wow! What a difference! With that seemingly worse left eye, things were now much clearer. Somehow, when the optics of the lens in the door’s spy-hole was combined with my cataracted left eye and its usable up-close vision, I could see more clearly. What a pleasant, useful result from such a simple change in behavior.
The lesson for me was in learning that changing my behavior in this small way (switching eyes) resulted in a definite improvement. Are there any other old dogs out there who could improve things a bit by changing their behavior a bit?