All are intended to decrease eye pressure and, thereby, protect the optic nerve. Currently, in the US, eye drops are often the first choice for treating patients. For many people a combination of medications and laser treatment can safely control eye pressure for years. Eye drops used in managing glaucoma decrease eye pressure by helping the eyeâs fluid to drain better and/or decreasing the amount of fluid made by the eye. Drugs to treat glaucoma are classified by their active ingredient.
The class Arachnida includes a diverse group of arthropods: spiders, scorpions, ticks, mites, harvestmen, and their cousins. The class Arachnida includes a diverse group of arthropods: spiders, scorpions, ticks, mites, harvestmen, and their cousins. Scientists describe over 100,000 species of arachnids. In North America alone, there are about 8,000 arachnid species. The name Arachnida derives from the Greek arÃ¡chnÄ, which means spider. The vast majority of arachnids are spiders. Most arachnids are carnivorous, typically preying on insects, and terrestrial, living on land.
Fun Facts about Arachnids for Kids. 1  Most spiders have eight eyes, but some have only two, four or six. 2  All spiders have venom, but only a few kinds of spiders are dangerous to people. In the U.S., only two spiders have venom that can make people sick. 3  Scorpions have a stinger and strong pincers to deal with prey.