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699 Views 2 Replies Last post: Feb 20, 2013 3:28 PM by grantburleigh RSS
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Jan 19, 2013 4:00 PM

Froghoppers and their eyes

I have found myself wondering how the eyes of froghoppers work. Does the central dark component have a lens in it? Or does the eye operate like a pinhole camera?

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    Feb 20, 2013 1:05 PM (in response to grantburleigh)
    Re: Froghoppers and their eyes

    The central dark spot is a pseudo-pupil. Each ommatidium (one of the "cells" that make up an insect's eye) is lined on its interior sides with an opaque colouring that gives the eye its overall colour.  Only on those individual ommatidia which are facing you, will you be able to see the black at the end of the cell where light is absorbed. This is why when you look at an insect and move around it, the "pupil" appears to follow you perfectly.

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