We have used Stan to show that vision in present in the brittle star, an animal lacking eyes:
https://journals.biologists.com/jeb/article/doi/10.1242/jeb.236653/256564/Run-and-hide-visual-performance-in-a-brittle-star
https://www.cell.com/current-biology/fulltext/S0960-9822(19)31512-X
as well as in millipedes, which have only basic eyes:
https://doi.org/10.1016/j.visres.2019.09.003
We have also shown that a nocturnal scarab beetle orients better with more polarized light. These animals could orient better with polarized light from the moon than without and this improves with increasing moon phase:
https://jeb.biologists.org/content/222/2/jeb188532