A childhood belief about speaking

One time when I was in my backyard, I was playing with this baby toy, which probably belonged to my sister, but I'm not really sure. It was one of those toys that vibrate when a cord is pulled. I decided to have a little fun with that toy by biting the handle at the end of the cord with my teeth and letting go with my hands. It made my head vibrate, and my vision "vibrated" along with it. I went and told my dad, who was in the backyard as well. I told him that when I let go of the toy while biting the handle, it made my eyesight "blorry." He didn't know what I meant, and I was also confused because my dad was the first person I heard that word from (the correct word, of course, but I misheard). After some frustrating discussion, my dad finally figured it out, and he explained to me that the word I intended to say was not "blorry," but rather "blurry."