Seen Any Troglobites Lately?
If so, then they probably haven't seen you, considering the fact that they are eyeless. Troglobites live in caves and include various species of millipedes, spiders, worms, blind salamanders, and eyeless fish. Since they live in caves, which inherently have little, if any, sunlight, they have little need for sight and have evolved their other senses more fully.
These eyeless cave animals are known as "true troglobites," while the animals who have partial eyesight are known as "troglophiles." Troglophiles may live near the entrance of the cave, or in an area where there is partial light. The September 2007 issue of National Geographic has an interesting story about these creatures along with many interesting & mysterious photos. As with countless species of animals around the world, even these small critters face an uncertain future due to pollution, vandalism, and quarrying. (The photo in this post appeared in the National Geographic Photo Gallery about this story and was taken by David Liittschwager.)