Is it possible to programmatically dim a section of the MacBook screen?

Question

macOS

I have a hardware problem - the dot on the screen is overexposed, too bright. If I could programmatically set what this point is - be darker in brightness - this would solve the problem.
If there is a black background under this point, then the glow disappears. If there is a gray background under it, the problem disappears by half. The color changes. That is, everything is OK with her, but too bright in that place.

Answer 1

It is impossible if your matrix is ​​​​not AMOLED. For IPS, TN and other matrices, the screen is backlit using one common element - a luminous plate, roughly speaking. In AMOLED, each pixel has its own backlight, independent of other pixels.