Have you ever done that trick where you position your fingertip in just the right spot where the nerves on the retina converge, causing your fingertip to disapp

Have you ever done that trick where you position your fingertip in just the right spot where the nerves on the retina converge, causing your fingertip to disappear from the field of view? When I first did this there were two surprises, the one I expected, when I saw my fingertip vanish. And then a bigger one I did not expect, which is noticing I had never noticed this deficiency before, despite it being literally right before my eyes my entire life. When I was a teenager I held something approximately like your view on ADD, (there was no ADHD variant yet). That it was mainly a crutch, a blame-deflecting explanation for failure sought by those who couldn't get their shit together for character flaw reasons. This attitude made me turn down an offer by one of my professors, who also happened to be a clinical psych., to connect me with someone who might be able to diagnose whether or not I had this issue. I went without a diagnosis for another decade before circumstances press me to reconsider my position. The very first time that I took medication that was prescribed to me was like that optic nerve blind spor revelation, but in reverse (and magnitudes larger in effext): a deficiency that had been with me my whole life, but completely invisible not because I could not see it, but because I saw everything through it, suddenly vanished. The effect is difficult to summarize in a few words but it's as if I had gone my whole life not knowing that I needed to wear reading glasses (in a world where they were still quite rare and uncommon) - attributing my inability to remain engaged with any text longer than a few sentences without becoming strangely fatigued to a lack of willpower or mental conditioning - and then putting them on. "_this_ is what everyone else sees?!"