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Do insects with compound eyes have depth perception? They fly as if they do, but their eyes are so close together it seems like the image would be 2 dimensional.

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"1001 questions answered about insects" by Alexander Barrett and Elsie Broughton Klots includes the following passage:

Do insects have depth perception? Depth perception of some sort is important to an animal who has to catch its prey; fortunately most insects have it to a degree. Although they do not have binocular vision that can be compared with man's, it is true that when one eye is covered their depth perception is markedly affected. The criterion of depth seems to depend on the angle of simultaneous stimulation of two corresponding points of the retina of the two eyes.

However it does not mention compound eyes specifically.

There may be other methods of obtaining a perception of distance rather than the binocular vision seen in humans. This paper suggests that there is 'clear evidence' that some insects perceive depth by moving their head to artificially create parallax, which they can then recognise and interpret as depth and distance. They cite the Praying Mantis as an example, which does have compound eyes.

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    $\begingroup$ keep in mind they do this the same way we do, by having two different eyes, a single compound eye will not have depth perception. $\endgroup$ – John Feb 15 '18 at 7:38
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The sense of depth is required to us to orient ourselves in a 3D world. Insects do orient themselves in the exterior 3D world, thanks to the ability to detect the plane of sunlight polarization, that is used as a navigation compass in foraging expeditions and when coming back home.

You can find a good review on Current Biology (Krapp 2007) and a lecture about insect vision from Cornell University.

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Short Answer:

Yes.

Nityananda et al. (2018) confirmed a novel form of stereo vision by putting tiny colored glasses on praying mantises.

enter image description here

(Newcastle University, England) [source]

Long Answer

Background

Stereopsis = the perception of depth and 3D structure obtained from visual info from 2 eyes.

Vertebrates (including humans and all primates) use stereoscopic vision to perceive depth. Each eye sees slightly different images based on their side-by-side orientation, which allows the brain to "calculate" the difference and generate our perception of depth. This is typically accomplished in organisms with 1+ billion neurons in the brain.

Nityananda et al. (2018) have confirmed for the first time that an invertebrate (with only ~1 million neurons) also is capable of stereopsis.

  • Work by S. Rossel (and others) as early as 1983 had previously suggested this was the case.

Specifically, their work showed that instead of using correlations of image contrast for stereopsis...

Mantis stereopsis...relies on detecting luminance change at positions corresponding to appropriate disparities.

In other words, they propose that mantids are looking for changes in the light patterns over time -- basically, they're only looking for movement.

You can read their paper here.

Sources

  1. Nityananda, V., Tarawneh, G., Henriksen, S., Umeton, D., Simmons, A. and Read, J.C., 2018. A Novel Form of Stereo Vision in the Praying Mantis. Current Biology.

  2. Khan, Amina. 2018. What do you see when you put miniature glasses on praying mantises? A new method for robot vision. Los Angeles Times. Accessed Feb 2018. http://www.latimes.com/science/sciencenow/la-sci-sn-praying-mantis-vision-20180209-story.html.

  3. Wikipedia. "Stereopsis." Accessed Feb 2018. https://en.wikipedia.org/wiki/Stereopsis.

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Do insects with compound eyes have depth perception? The compound eye structure involves many lenses mounted around a dome where the image is redundant yet slightly modified by the position of the lens on the dome surface. That also provides depth perception in addition to the normal binocular vision as they have two eyes. This is a random guess without researching and reading what others have studied about the subject matter.

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

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    $\begingroup$ Please read the other answers before posting yours. If you say that yours is a "random guess", then maybe is not worth posting it. $\endgroup$ – LinuxBlanket Feb 15 '18 at 14:26
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    $\begingroup$ Please provide evidence/citation(s) to support your answer. Right now it comes across as an unsubstantiated opinion. See here for suggestion for writing good answers on this site. Thanks. $\endgroup$ – theforestecologist Feb 16 '18 at 2:15

protected by AliceD Feb 16 '18 at 22:51

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