The data isn’t usually gone, just spread out!

Deconvolution was used to fix the Hubble Space Telescope.

https://en.wikipedia.org/wiki/Hubble_Space_Telescope#Flawed_...

Even more impressive, you can see around corners with similar reconstruction techniques

https://graphics.stanford.edu/papers/dual_photography/

https://www.quantamagazine.org/the-new-science-of-seeing-aro...