how do we see upright if the images produced by our eyes are vertically inverted ( i know our brain does something to fix it... but not sure exactly what)
Merci
To understand why we perceive the world upright despite the inverted images formed on our retina, we need to explore the concept of visual perception. Here's an explanation of how our brain processes visual information to create upright perception:
1. Light enters the eyes: When light reflects off objects and enters our eyes, it passes through the cornea and the lens. This process focuses the light onto the retina at the back of our eyes.
2. Inverted retinal image: The lens in our eyes projects a reversed and inverted image onto the retina. So, the top of an object is projected onto the bottom of the retina, and the bottom of an object is projected onto the top of the retina.
3. Retinal photoreceptors: The retina contains two types of photoreceptor cells – cones and rods. Cones are responsible for color vision and detailed perception, while rods are sensitive to low light conditions.
4. Photoreceptor signal transmission: When light hits the retina, it triggers chemical reactions in the photoreceptor cells. These reactions convert light energy into electrical signals, which are sent to the brain via the optic nerve.
5. Visual processing in the brain: The optic nerve carries these electrical signals to a specific region in the brain called the visual cortex. Here, the brain processes and interprets the information received from both eyes.
6. Visual cortex adjustments: The visual cortex combines the input from both eyes and makes adjustments to the raw visual data. One crucial adjustment is correcting the inversion of the retinal images.
7. Perception of upright image: Through a complex process known as visual integration, the brain combines the information received from both eyes, compares it to previous visual experiences, and creates the perception of an upright visual world. This process occurs automatically and without our conscious effort.
It's important to note that the exact mechanisms involved in perceiving upright images are still an active area of research in neuroscience. However, this explanation provides a general understanding of how our brain compensates for the inverted images formed on the retina, allowing us to perceive the world upright.