Are you having trouble writing a high school evaluation essay on the spatial order in human visual perception? If that’s the case, you can put your worries aside. Over the years, we’ve been helping high school and college students like you master the art of good essay writing.
In this first guide, we discuss 10 facts on the spatial order in human visual perception. These facts will come in handy during the evaluation essay writing process and aid you in writing the best evaluation essay that will leave quite the impression on your high school professor.
Our second guide outlines 20 evaluation essay topics on the spatial order in human perception. These evaluation essay topics are relevant to the facts mentioned in this guide. We’ve also included a sample evaluation essay on the spatial order in human visual perception so that it becomes easier for you to write the actual evaluation essay and borrow essay topic ideas from the sample, so to speak.
Finally, the third one is an academic guide to writing an evaluation essay on the spatial order in human visual perception. By reading this guide, you will be able to outline and seamlessly write an evaluation essay that rocks.
Without further ado, here are 10 facts on the spatial order in human visual perception:
- Human visual perception is far beyond our imagination. When we see our Earth’s surface, it appears that we can see nothing more than a few kilometers that lead up to the horizon. This is because the surface of the Earth literally curves out of sight after 5 kilometers. If the Earth’s surface were to be flat on the other hand, you would see a flickering candle flame even 48 kilometers away. In addition, our naked eye can see the Andromeda Galaxy, which is located 2.6 million light-years away from Earth. The source of light that enters our retina travels from 1 trillion stars in the galaxy.
- Technically, we can see the color red with our naked eye, but in theory, it’s quite the opposite. Some scientists believe that the retina has receptors similar to that of an RGB (red, green, blue color spectrum) monitor. However, the eye’s retina can’t detect red shades. The so-called “red” receptor actually detects yellow-green hues whereas the “green” receptor detects blue-green colors or hues. These colors are then differentiated by our brain which tells us to see red colors.
- Selig Hecht, known for his remarkable work on human eye perception, made an accurate measurement of the human vision’s absolute threshold in 1941; i.e. the number of photons that must strike our retinas in order to stimulate the brain with visual awareness. The study that led to such a remarkable discovery was performed under ideal conditions where participants were allowed to adapt to total darkness; flashlights of 510-nanometer blue-green wavelength, acted as a stimulus, to which the human eye is most sensitive. It was concluded that our brain interprets vision when the retina is exposed to 5 – 14 photons.
- The human eye perception is limited to a certain degree. We are only able to see colors between 350 to 700-nanometer wavelengths. This is why we are not able to perceive ultraviolet and infrared colors. Ultraviolet colors fall in shorter wavelengths than 350 nanometers, whereas infrared colors are longer than 700-nanometer wavelengths.
For example, when you take a look at bananas, you see the color yellow because they bounce off-color wavelengths of 570-580 nanometers when hit by full-spectrum light.
- Have you ever asked yourself why you see things in 3D? Our brain is responsible for reconstructing images that let us experience life from a 3D perspective. This is because we have a pair of eyes that gives birth to a phenomenon known as Binocular Disparity – a slight difference in perspective between the left and right eye.
Binocular disparity plays a vital role in giving depth to a scene. Convergence is another phenomenon that signals the brain to create depth of field, particularly when you are focusing on something close to your eyes.
- While we can see and perceive colors at the center in high resolution, our peripheral vision is very low in resolution – it’s blurry and nearly monochrome. However, we don’t actually see our peripheral vision as a monochrome image because our eyes and brain are quick enough to fill in the required details as soon as we become aware of this fact.
- It takes time for the human eye to perceive the visual depth of a scene. The brain of a newborn child is not fully developed and must adapt to the new environment first before learning to construct a three-dimensional perspective. A study on infants has revealed that it takes a two months old baby to construct depth awareness of an image.
- Human visual perception is able to “adjust” to the dark by activating its own ‘night vision mode’. The neural pathways of the brain recalibrate themselves chemically to turn on scotopic vision circuits. These circuits are normally off during the daytime and require 20 minutes of darkness to be active.
Scotopic vision circuits do not adapt to colors other than blue, as their receptors are blue-sensitive. You might have noticed how everything tends to take a bluish hue when you are trying to see in the dark. Ever thought about why you can see the stars twinkling and shining at night? It’s because these receptors are very sensitive to even minor fluctuations in light.
- The brain is the main asset behind our visual perception. The eyes are merely tools to perceive light and transfer it to receptors that signal the brain to form images. The brain is, for a fact, the main component that constructs images and enables us to see perfectly. For example, our retina captures and interprets everything upside down, but still, we see everything on the right side up.
- There are 100 million photoreceptors in each eye that enable us to see crystal clear images. However, there are only a million nerve fibers that act as a bridge to the eyes and brain. So, technically speaking, the resolution of our eye is not more than 1 megapixel.
These facts will help you come up with your own evaluation essay topics and create a good evaluation essay disclosing the pros and cons of any issue with ease. For more guidance, head to our second and third guides.
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Natalie Wolchover, 2012 “How Far Can the Human Eye See?” – Livescience http://www.livescience.com/33895-human-eye.html
Stephanie Pappas, 2010 “How Do We See Color?” – Livescience http://www.livescience.com/32559-why-do-we-see-in-color.html
Stephanie Pappas, 2010 “Why Do We See in 3-D?” – Livescience http://www.livescience.com/32580-why-do-we-see-in-3-d.html
Fiser, J., & Aslin, R. N., 2001 “Unsupervised statistical learning of higher-order spatial structures from visual scenes” Psychological science, 12(6), 499-504.
Gale Encyclopedia of Psychology, 2001 “Depth Perception” – Encyclopedia http://www.encyclopedia.com/doc/1G2-3406000183.html
Brain Resources, “How Vision Works” – Brain HQ http://www.brainhq.com/brain-resources/brain-facts-myths/how-vision-works
Paul King, 2016 “Visual Perception: What are some Mind Blowing Facts about the Human Eye?” – Quora https://www.quora.com/Visual-Perception-What-are-some-mind-blowing-facts-about-the-human-eye