Worms can not see, they just feel for moisture in the ground and navigate themselves to areas with high moisture. (This is why there are worms on the ground when it rains.)
You may be thinking of the inchworm. See link for more details.
To check if an inchworm is hurt or dead just :Touch the inchworm real gentle and pay close attention to see if it's still moving and if it does move a little it means it's not dead. Also if you want to check if it's hurt do this :See if it trys to climb something and spread its silk.
Inchworm - song - was created in 1952.
No, my baby is not an actual inchworm. The term "inchworm" is often used to describe the movement of a baby learning to crawl, where they move forward by arching their back and then bringing their knees up close to their chest.
Inchworm - A small hairless caterpillar
leaves
inchworm
An inchworm can survive for a few days to a week without food, depending on its energy reserves and environmental conditions. After some time without food, the inchworm's health and ability to survive will be compromised.
one inch.
Inch-worm.
inchworm
An inchworm will stay in their cocoon for about 2 weeks. They tend to stay in an extra week most of the time.