I once dropped my phone like 40cm the 100th time and my screen went completely black. However, the touch still worked! After loads of time and comparing to another android phone, i managed to blindly navigate to that blind mode setting and enable it!

I have immense respect for those that are blind and need to interact this way. In the few days I used my phone this way I noticed multiple apps, especially my bank app with a keypad, had completely broken navigation and iirc not even numbered the actual buttons?! So it was a 'swipe right 9 times, double tap, swipe left 6 times' while the TTS was yelling nonsense!