Depth Perception in Humans and Why It’s Important

Did you know that there is a type of insect that can actually see our world with 3D vision?

Well, you do now. The praying mantis is the only invertebrate known to be able to see in 3D.

This article in Science Mag explains that scientists glued the world’s tiniest 3D glasses on 20 praying mantises in a study.  The glasses showed the insects a series of movies with patches of different dots moving, which acted as potential “prey items,” and camouflaged them against a matching background.

What they found is that unlike us humans, the predatory praying mantises can detect prey that comes within striking distance, but their depth perception only works when the prey is actually moving.  The insects tried to catch “prey” that appeared to be within centimeters of where they stood and they could still do it even when the “prey” item looked different to each individual eye! Pretty fascinating because this is something that people found challenging when they were asked to perform the same task in the study.

Humans apparently see in 3D by piecing together the actual image coming in from one eye versus the other eye, but this study shows that praying mantises only bother piecing together the motion, as the actual image does not matter to them.

The article proves that this is the first time that 3D vision has been found in nature, and it’s an example of nature coming up with different solutions to the same problem…i.e., when should we try to swat a that pesky fly?

So you’re probably wondering, what does this mean for us?  This is a huge safety issue.  Our brains need both eyes as clear as possible to have the best depth perception. 

If you have a large prescription in your glasses, you’re not getting great depth perception in the periphery of your vision due to the prismatic effect of the peripheral glasses curvature. Glasses only give good depth perception when looking through the center of the lens. We are here to help you get out of those glasses with highly customized refractive surgery options.

Also, for those of you readers that have been prescribed bifocals…bifocals have been proven to distort vision when the wearer is looking down. And as we have sadly reported before in previous blogs, falls have proven deadly for our senior citizens.

We are here if you or a loved one is bothered by a lack of depth perception or night vision – please call us to schedule either a free evaluation for LASIK or an advanced, personalized cataract surgery option to fix this highly dangerous issue at 713-626-5544. 


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Posted in: Cataract surgery Houston, Lasik Houston

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