I approached the prompt inversion (excuse the title) gradually, starting with a natural inversion – or rather an inversion occurring naturally without human intervention.

I progressed to a man-made inversion:

And then, the first photographic inversion, a natural step after the inverted glasses:

Which led – again quite naturally – to photos created with a lensball. Here are the actual first two lensball photos I took – it was around Easter as you can see:

Inversions created solely on the computer were a natural follow-up:

Linked to the Cosmic Photo Challenge: Inversion.