[Olorin_TLA]

When Beren slays Charcaroth, the Silmaril falls into the waters.

Then, at the end of the last film, we see it float along through water, until it reaches the Washbasin of Udun, where it falls straight into Sauron's left eye, casuing extreme burning and pain!

And so, loyal viewers, you have seen the Origin of the Lidless Eye!