Non Round Pupils

[willtheld]

Hey,

just general curiosity, I notice many speicies we keep dont have round pupils, instead some have sideways tear drop shapes. Is there a biological function for this? Does this give these species advantages in vision that others don't? Im thinking of fish like the blue spot jawfish

 

[i cant think]

Hey,

just general curiosity, I notice many speicies we keep dont have round pupils, instead some have sideways tear drop shapes. Is there a biological function for this? Does this give these species advantages in vision that others don't? Im thinking of fish like the blue spot jawfish

I believe many of the Wrasses have these pupils and I find it’s because they’re best to hunt with. I’m thinking of species such as Halichoeres chloropterus. This is a somewhat teardrop shaped pupil.

 

[willtheld]

I wonder how it helps them hunt. Sharper optics? More telescope like vision? Like an iPhone camera array and different parts of the eye give dfferent angles?

 

[Steve and his Animals]

Wider pupils give the animal a wider field of vision, at the cost of visual acuity. Jawfish have a very wide field of view from their eye placement alone, so their pupils are marginally wider than average to help with a slight increase without too much of a hinderance on their ability to grab food and decorate their burrows right in front of their face.

Animals like goats and other hooved animals have super wide, almost figure-eight-shaped pupils for a very wide field of view behind them, as they are prey animals. Goats eyes will even rotate in their eyes to be parallel to the ground while they lower their head to graze so they can still see things coming.

 

[Tamberav]

Yes, most likely.... think of grazing animals and their horizonal/square pupil.. so they can see danger approaching easier with a broad view. While vertical slits (ex: cats) allows them to judge distances of prey.

I think it is safe to assume fish evolve eyes best suited for them.

 

[HudsonReefer2.0]

Hey,

just general curiosity, I notice many speicies we keep dont have round pupils, instead some have sideways tear drop shapes. Is there a biological function for this? Does this give these species advantages in vision that others don't? Im thinking of fish like the blue spot jawfish

I think the fish wonder why their stupid human has round pupils. Just sayin.

 

[Tamberav]

It is an interesting topic... fish eyes are fairly different it seems from wiki:

Birds and mammals (including humans) normally adjust focus by changing the shape of their lens, but fish normally adjust focus by moving the lens closer to or further from the retina.