Ironically, most spiders have very poor eyesight despite having 8 eyes (some have more eight, some less than six) especially those that wait for their preys in fixed locations (such as leaves, flowers and windows).. Other than detecting swift motion, their spider vision can do nothing more than spotting changes in the environmental light intensity. The male reproductive system is a bit more complex. These spiders will use their main eyes for basic vision (with sharp, colored vision that allows them to see ultraviolet light that humans cannot see). https://www.livescience.com/24054-why-spiders-have-eight-eyes.html Jumping spiders have four eyes densely packed in a row: two large principal eyes and two small lateral eyes. What do spiders eat? Search-light eyes. 2. The front segment is called the Cephalothorax. Spiders do not have these types of eyes. Spiders have two body segments. So it would be nice to find a spider that wasn’t so hairy. Although some spiders can only see the difference between light and shadow, others, especially Jumping Spiders, are believed to have excellent eyesight. The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from other arachnids. Most spiders have eight eyes, but some have less. The testes are located on the underneath of the abdomen, and connect to the surface via a small tube. 3. Most spiders have 6 or 8 eyes. https://www.wonderopolis.org/wonder/how-many-eyes-does-a-spider-have Net-casting spiders (Deinopidae) have eight eyes, but in one genus, Deinopis, two of the rear eyes (PME) are enormously enlarged. The eyes are located in the front. Spider webs are made of silk produced by spiders for capturing their prey. The male spins a small mat of silk and deposits a ‘packet’ of sperm from the testes onto the silk mat. Many different species of spiders, especially jumping spiders, have four sets of eyes. The spider’s eyes, mouth fangs, stomach, brain and the glands that make the poison are on this part of the body. The legs are connected to this part, as well. How many eyes do spiders have? Most spiders have eight eyes. They need these extra sets of eyes, as they do not easily catch their prey in webs — they hunt! 4. Spiders usually live to be around 1-2 years old, with the females living longer than males. Spider eyes are considered "simple": they do not have multiple lenses and facets as do the compound eyes found on some insects. That Huntsman spider had a lot of hair, which made it a bit tricky counting its eyes. Unlike insects and other organisms, male spiders do have a penis. So let’s move in a lot closer. 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