Good shooting requires good feedback and the only way to get it is learning to keep your eyes open.
It is nearly impossible to progress until the ability to consistently and accurately call shots is developed. That is, seeing the sights lift in recoil as the triggered shot is released. Seeing that tenth of a second window that tells you where your shot really went.
Most gun owners never develop that ability, or even realize its importance. Here is an example of what this is supposed to look like but COL Denise Loring of the USAR Marksmanship Program.
Notice her eye stays open for every fired shot. Man up and learn to shoot like her.