I am working on a speculative evolution project at the moment that has a low atmospheric scale. As a result, the ground is almost always covered in fog or cloud-like fog that is universal across numerous humid biomes. A small minority of the year will see a reduction to this fog. Visibility can vary from a light mist to a dense fog, with somewhere in between being the average.
Fog reduces visibility, as anybody who went outside while it was foggy would know. An animal with poor vision could not hunt or forage in those conditions without specific adaptations for it. So, I am inquiring about what types of eye adaptations would help an animal in vision-impaired conditions such as this. The specialization of any recommended adaptations shouldn't be a concern as my basic reference are slug eyes.
Some quick things I would like to mention:
- I do not want the animals to hibernate for the entire year until it isn't cloudy. I feel it would be inevitable for an ecological niche of animals that adapt to living in the fog. After all, nocturnal animals exist.
- I do not want the animals to be blind. Some blind animals are fine but I would like to see more creative solutions. These animals are unlikely to devolve their eyes, which are their best source of sensory stimuli, in favor of evolving borderline non-existent sensory systems.
I appreciate scientific accuracy, but it is not a chain here. So, the question at hand is "What type of eyes are best suited towards constant ground-level fog and cloud cover?"