You will need some footage


You will need some footage of a fire in order to do this.
Get your eye video shot and your fire video.
Import it into motion with the fire layer over the eye layer.
when in the fire layer you will need to zoom into the eye and mask out where you want the fire to appear you will need to set the selection to add so that it gets rid of what is not in the mask.
From there I would set the opacity of the fire layer so that the eye is visible through the fire quite a bit.

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