This mod makes everything in the game invisible, except your player inventory. You will still be able to see what each block in the world is by punching it, and this will simulate how a blind person would have to navigate their way through minecraft. If you are really hardcore, turn off the sound and play the game with no visuals and no sound, effectively making you Helen Keller.
Mobs, Blocks, grass, etc. will all be invisible, but mobs will still spawn as normal, so if you are getting attacked you will simply start taking damage and its up to you to figure out why.
Several status effects have been added to the game to simulate the ability to feel things. You will get a 'near lava' status effect when lava is nearby, because any person, even a blind one, could feel the intense heat coming off of lava. There are also status effects for when mobs are nearby, meaning you are not completely in the dark on what is happening, and you have a bit of a chance to respond.
Requires forge 51.0.33 for minecraft 1.21