Spider eye is a poisonous food and brewing item. It is dropped by either Spiders or Cave Spiders when killed by the player, but is not dropped by spiders that die from environmental damage (such as a mob grinder). It is also dropped by Witches. Spider eyes are mainly used to craft fermented spider eyes and brew mundane and poison potions. It can be eaten, but will poison the player for four seconds, causing of damage. This damage cannot kill the player (it cannot reduce health below ).