Screen panel uniformity (OLED)

As people may be aware, the 7T seems to be shipped with a significant amount of of the first few batches having weird green, blue and purple tints on various places on the screen (especially noticeable on lower brightness settings).

I was wondering if there would be any ways of fixing this?

Has this ever occurred in the past?

Can we fix this issue ourselves? I would love to fix this issue myself someday because I hate sending my phone out to other places and i plan to tear it open next year anyways.