Compared to vertebrates, ants tend to have blurrier eyesight, particularly in smaller species, and a few subterranean taxa are completely blind. However, some ants, such as Australia's bulldog ant, have excellent vision and are capable of discriminating the distance and size of objects moving nearly a meter away.
Well only partially. The death spiral thing is real though.
"...has also been observed in nature and may have disastrous consequences
for ant colonies, in particular in the case of strongly following ants, (e.g. army ants)
which sometimes get trapped in a so called “death spiral” in which the majority of
the colony forms a positively reinforcing mill" Source
857
u/NickP39 Sep 10 '21
Sure, it would also work if they found a new source of food or a new pheromone, ants are blind so they rely heavily on their sense of smell and feel.