3 ms·
The article was interesting an informative, but it's really surprising to me that all humans have the same sized eyeballs. I would never have guessed that!
by RandallBrown 7y ago
The article was interesting an informative, but it's really surprising to me that all humans have the same sized eyeballs. I would never have guessed that!
- 1-6 7y agoInteresting... birthworks.org: "From outward appearances, by three months, our eyes are the same size that they will ever be as the corneas have reached their full width"
- shadowgovt 7y agoWhat I'm most curious about is what mechanisms control that, given the most obvious one to me---shining light through the developing lens and determining if the retina is getting good image resolution---is obviously impossible inside a body.
- throwaway34241 7y agoThe actual mechanism might be something like that! Nearsightedness is often caused by the eyeball developing to be too long. It’s actually dramatically increased in some places in Asia, where 90% of schoolkids can be nearsighted. [1] There’s a lot of research pointing towards biological processes involving contrast (which is probably a decent proxy for focus) being involved in eye development, with maybe different visual stimuli (due to more time spent indoors) being a potential cause of the increased myopia rates because it doesn’t activate the specific mechanism in the right way. [2] [3] [1] http://healthland.time.com/2012/05/07/why-up-to-90-of-asian-schoolchildren-are-nearsighted/ http://healthland.time.com/2012/05/07/why-up-to-90-of-asian-... [2] https://www.sciencedirect.com/science/article/pii/S0042698917301372 https://www.sciencedirect.com/science/article/pii/S004269891... [3] https://www.nature.com/articles/s41598-018-28904-x https://www.nature.com/articles/s41598-018-28904-x