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Basic arrangement of spider eyes, viewed from above. Most spiders have eight eyes, which tend to be arranged into two rows of four eyes on the head region. The eyes can be categorised by their location and are divided into the anterior median eyes (AME), anterior lateral eyes (ALE), posterior median eyes (PME), and posterior lateral eyes (PLE).
The posterior median eyes have excellent night vision, allowing them to cast nets accurately in low-light conditions. These eyes are larger than the others, and sometimes makes these spiders appear to only have two eyes. Ogre-faced spiders are the best known genus in this family. The name refers to the perceived physical similarity to the ...
In noct-diurnal spiders, meaning those active during both the day and night, the blue eye cells have been found to be most responsive to circadian systems. In the nocturnal Araneus ventricosus , it has then been found that their anterior median eyes are able to change sensitivity in accordance with their circadian rhythm, meaning that the ...
English: A diagram of the CT (canoe type) secondary eye in spiders 1: lens 2: vitreous layer 3: visual cells 4: rhabdomeres (light-sensitive component of the visual cells) 5: tapetum 6: retina 7: optical nerve
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Rabidosa rabida, also known as the rabid wolf spider, [2] is a species of spiders from the family Lycosidae, native to North America. [1] In the United States it is found from Maine to Florida and west to Texas.