Most spiders typically have eight eyes, usually arranged in pairs, but this number can vary depending on the species. While the majority have eight eyes, some spiders have six, four, two, or even no eyes at all, especially those adapted to cave environments

. The eyes of spiders are simple eyes (not compound like insects) and are arranged in specific patterns that help identify different spider families. The central eyes usually detect size, shape, and color, while the side eyes are more sensitive to motion

. Despite having multiple eyes, many spiders have relatively poor vision and rely heavily on other senses such as touch, vibration, and taste to navigate and hunt. However, some spiders like jumping spiders, wolf spiders, and net- casting spiders have well-developed eyesight and use their eyes actively for hunting and recognizing mates or rivals

. In summary:

• Most spiders have 8 eyes.
• Some species have fewer (6, 4, 2) or none.
• Eyes are arranged in pairs with different functions.
• Vision quality varies widely among species.

This diversity reflects evolutionary adaptations to different lifestyles and environments