Do you know camels have 3 eyelids its mean they have 3 protector eyesheilds for their eyes to protect them to the sands of desert

they have ....

Upper eyelids

Iris

Pupil

Sclera

Lower eyelids

At last the third eyelid ( nictitating membrane)

  Two of the eyelids have eye lashes which help protect their eyes from sand.  The third is a very thin lid which works as a sort of “windshield wiper” to clean off their eyes.  It closes/opens from side to side rather than up and down.  It is also thin enough that the Camels can see through it somewhat.  So in a sandstorm or otherwise windy day where sand is being stirred up, they can close that lid to protect their eyes from the sand, but still see where they are going.