A highlight focused on the development of the trilobite eye — one of the most complex ever captured in the fossil record. Trilobite eyes were made of a staggering number of tiny calcite lenses ...

The team also revealed that only a few million years later, improved compound eyes with higher resolution developed in another trilobite species from the present-day Baltic region. The study is ...

They have 24 eyes arranged in four clusters; 16 are simply light-sensitive pits, but one pair in each cluster is complex, with a sophisticated lens, retina, iris and cornea. Trilobites went down a ...

for each group Redlichiida – These early trilobites tend to be very flat and have crescent shaped eyes. The third segment from the head often has large spines extending out to the side. Phacopida – ...