How do termites see if there blind?

Yes Termites are blind, due to undeveloped eyes! When worker termites on a piece of paper with a continuous line on it, the termites follow it? How do they do this without sight? Well, through research, we can see that they only follow ink, due to the fact that it may contain some type of pheromone, which attracts the termites. They use the sense of smell also to follow as well. Otherwise, they just walk around blindly!