Creating a 3D lens

Hello! We are attempting to create a lens that lets you see "into" an image. For example, if you have a body, when you hover the lens over a certain portion, it would show you the corresponding skeleton. We are trying to create this kind of effect on a globe, so it would need to be spherical/3D. Is a shader the correct way to approach this or is there something else that we could do?
Any help or suggestions would be much appreciated! Thanks!

 

Never mind, this was meant to be a posted question - I'm very new to Unity and I just found the question forum. Sorry to bother anyone.

 

We found the answer to our question on this page: https://gamedev.stackexchange.com/questions/152824/how-can-i-create-a-see-behind-walls-effect