Figure 1. (A) Vision in a fast-eyed insect. Reflected light from swiftly moving objects sequentially stimulates the photoreceptors along the individual optical channels called ommatidia ...

Nocturnal insects now deal with a very different ... and focus it onto a bundle of photoreceptors. The ability to make sense of very low light levels is also due to higher contrast sensitivity ...

with photoreceptor cells, and this makes the eye a very fascinating organ. Furthermore, various animal groups have evolved very different types of eyes. The insects have evolved a compound eye ...

How they do so is now being elucidated. We see color because photoreceptor cones in our eyes detect light waves corresponding to red, green, and blue, while dimness or brightness is detected by ...

The Scientist: How can too much sunlight damage the eye? Ralph Chou: Light comes into the eye and goes through all the various layers of cells until it reaches the photoreceptors—essentially, the ...

A third eyelid sweeps across from the corner of the eye to help clean the surface. As well as having massive eyeballs that join at the top of the head, these horsefly males have two different sized ...