Highly relevant is the Portia genus of spiders ([0], [1]) and apparently other related jumping spiders ([2]).
One of my favorite excerpts from [1]:
> Harland says Portia’s eyesight is the place to start. Jumping spiders already have excellent vision and Portia’s is ten times as good, making it sharper than most mammals. However being so small, there is a trade-off in that Portia can only focus its eyes on a tiny spot. It has to build up a picture of the world by scanning almost pixel by pixel across the visual scene. Whatever Portia ends up seeing, the information is accumulated slowly, as if peering through a keyhole, over many minutes. So there might be something a little like visual experience, but nothing like a full and “all at once” experience of a visual field.
One of my favorite excerpts from [1]:
> Harland says Portia’s eyesight is the place to start. Jumping spiders already have excellent vision and Portia’s is ten times as good, making it sharper than most mammals. However being so small, there is a trade-off in that Portia can only focus its eyes on a tiny spot. It has to build up a picture of the world by scanning almost pixel by pixel across the visual scene. Whatever Portia ends up seeing, the information is accumulated slowly, as if peering through a keyhole, over many minutes. So there might be something a little like visual experience, but nothing like a full and “all at once” experience of a visual field.
[0] - https://en.wikipedia.org/wiki/Portia_(spider) [1] - http://www.dichotomistic.com/mind_readings_spider%20minds.ht... [2] - http://news.nationalgeographic.com/2016/01/160121-jumping-sp...