Whips aren't visible to the naked eye.
Whips, btw, are nasty:
Whipworm eggs are somewhat susceptible to drying, but can remain alive in moist soil for years, and are resistant to freezing. Because of this, animals should be restricted from contaminated areas. There is no effective method for killing whipworm eggs in the soil. The only alternative is to replace the soil with new soil, gravel, and pavement. To prevent exposure, any feces in the yard should be picked up on a daily basis. Roundworms are long, white, look like spaghetti.