It’s not about to see better, but seeing a wider range of colors and even polarized light. It’s like having a sniper scope with night vision, just what these critters need to capture their prey. They do not need a clear vision more than one meter. just the distance to knock out the prey with the fastest fists in the west or in the case of the Pistol shrimp, which can close its pincer with such violence to produce a plasma bubble with the effect of a small caliber revolver (the aquariums with these need reinforced glass)