Reason why Ragdoll cats have blue eyes

Ben in his video below explains why Ragdoll cats have blue eyes for the standpoint of physics. But it isn't just Ragdoll cats which have blue eyes. Kittens have too and Siamese must have blue eyes and other breeds are allowed to have blue eyes under their breed standards. 

The physics behind the blue eyes of cats including the Ragdoll. Screenshot.

The Ragdoll breed standard states that Ragdolls must have blue eyes. EYES: large, vivid blue ovals. Wide set and moderately slanted, complementing wedge.

And the anatomical reason and the physics behind the blue colour of their eyes is explained in the video below. The same reason applies to kittens when their eye colour is developing but not yet developed.

Blue eyes caused by scattering of blue light not pigment. Image: MikeB

And the same physics applies to the blue sky. The color blue has a shorter wavelength than the other colours and it is scattered more by the particles in the air which is why the sky is blue.

RELATED: Why are kittens’ eyes blue?

It is this scattering of blue light and not the other colours which accounts for blue eyes in Ragdoll cats.