The Ice Lens is a discovery related to the purple continent area.
A giant lens made purely of ice, it is supposedly impervious to heat. Legend has it that people of the ancient world used the lens to burn ships out of the sky, or to see far away lands. But then, why was the focal point last centered on Glacia itself?
The Ice Lens is exclusive to Skies of Arcadia Legends.
It can be found on a mountain in the Lands of Ice, near the creature "ship" Alania. It is, in fact, on the mountain right next to where you first find the creature, at central sky level.