Hey everyone. It’s Poppy here, your resident go-to girl for matters on science! Now, I know you might not like going to science class, but I’m going to tell you some cool stuff I learned from a psychologist I met at a college I visited with my mom. They were talking about the brain, and what happens in order for us to see something. The diagrams looked really complicated, but when she broke it down, I learned something really awesome about our vision!
We have something called a blind spot. And, it’s exactly what you’re thinking. It’s an actual spot where we can’t see. How does this happen? Well, let’s start from the beginning. When we look at an object, say a red apple, it sends physical waves to our eyes that move through the different parts of the eye. You know about your pupil, right? Well, that is just one of the many muscular components that make up our eyes, and allow us to see. Apparently, the pupil is actually a hole that is made from a gap in our eye muscles! Our eyes transfer those physical waves from muscle to muscle until they reach the site of transduction, which means they get turned into something called neural impulses. Now, I know it may seem like a lot of big words, which is what I thought, but the psychologist explained it to me in a simple way: the waves go through the eye, get to a site where things change, and then they come out as messages that are sent to our brains. Those messages tell us what we are seeing, and that we can out the image in our memory.
So, where does this whole blind spot come in? That has to do with memory. Our eyes don’t actually cover all the physical space in front of us when looking at a specific point. There is a spot that we can’t see, but we don’t see a hole or black spot there. Instead, our brain fills it in with our memories of familiar objects. For instance, if we only see a portion of something red, round, smooth, and shiny, our brain registers that the object is an apple. It does the same thing here, which is why we can’t see the blind spot. One way to know it’s there, though, is to look an object with one eye closed, and then switch eyes. The object isn’t in the same place, is it? This means that there is a blind spot, and that our brain fills it in for us! See, science isn’t always about words on a textbook- it can tell us cool things that our bodies do that we didn’t even know about!
Posted by GirlMogul Poppy