Your Eyes Are Lying, Lazy, Hateful, Wet Bags of Gross Meat

I am not an ophthalmologist. I had to google how to even spell that word. In this video I will prove - beyond any reasonable doubt - that your eyes are: lying, lazy, hateful, wet, and gross. Hopefully you also get a laugh out of it. 00:00 Introduction 00:24 Dominant Eye Test - Interactive 01:25 Thesis Introduction 03:14 Anatomy/Function of the Eye 08:35 Blind Spot Test - Interactive 09:20 Visual Perception and Deception 14:16 Peripheral Illusions - Interactive 15:44 Saccades - The Biggest Lie 17:19 Thesis Conclusion 17:46 Closing Remarks 18:37 Ending https://guidedogs.com __________ Footnotes: [1] There are actually five types of melanin: eumelanin, pheomelanin, neuromelanin, allomelanin and pyomelanin. The most common type is eumelanin, of which there are two types— brown eumelanin and black eumelanin. Pheomelanin is red/yellowish and can also be present in the iris. Not blue though. Or green for that matter. Neuromelanin is found only in the brain. Allomelanin and pyomelanin are two types of nitrogen-free melanin. I guess that makes them healthier. [2] The effect that causes your irises to appear blue/green/etc is called Tyndall Scattering. The effect that causes the sky to appear blue is called Rayleigh Scattering. The mechanism by which the effect of 'color-shifting' takes place is different between the two, but the effect itself is roughly the same. Also the sun is not actually impossible. It is, in fact, QUITE possible. Some would say indisputably possible. [3] "Your retina does image preprocessing based on how important it thinks the signals are" is a MASSIVE oversimplification of what your retina does. I can't summarize it well enough, so if you're interested you can read more here: https://en.wikipedia.org/wiki/Retina#... [4] The Meyer's Loop actually comes AFTER the Lateral Geniculate Nucleus. This was an honest mistake, I swapped the sentences in my script. Also, the Meyer's Loop wasn't pictured in the illustration I used, and thus makes this part seem slightly misleading in a very minor way. I still could not find a source to detail what the function of the Meyer's Loop is. [5] Your eyes still detect changes in your peripheral vision and relay them to you, but a static image in your periphery tends to fade very quickly which leads to the perceptual "filling in" as your brain uses the more detailed signals it receives from your fovea. Special thanks to Marte Otten, researcher and faculty with the University of Amsterdam, for permission to use the illusion pictured in the video! Find more fascinating peripheral vision illusions at https://uniformityillusion.com, and a write up of Marte's research at: https://www.sciencealert.com/study-sh.... ___________ CREDITS: Any media not listed is CC0, taken from Pixabay, Pexels, YouTube Audio Library, or Wikimedia Commons. Peripheral vision illusion "Orientation" created by Marte Otten of the University of Amsterdam. https://uniformityillusion.com Used with permission, thanks Marte! Macula illustration at 7 minutes, 33 seconds by BruceBlaus. Blausen.com staff (2014). "Medical gallery of Blausen Medical 2014". WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.010. ISSN 2002-4436., CC BY 3.0, https://commons.wikimedia.org/w/index... This video was written, filmed, and edited by me, Mason Amadeus. Notably, I am not a doctor and I knew almost nothing about eyes/vision going into this, so please feel free to correct anything I got wrong in the comments!