"But Moby, why would anyone want to use this mod?" I agree. No one should play with that and the entire premise of this mod is kinda stupid.
However, it can be nice for roleplay or if someone wants an extra challenge.

Makes it so the world is super blurry except up close. It's really configurable (per player, not using a global config) so you could just make it slightly blurry when it's far away, or make it super blurry right up your nose.

Adds three new glasses because I don't like the look of the default ones.
If you equip glasses, the blur goes away.

Also you can craft them if you have ChemistryLib.

To enable or disable the blur, use:

/nearsighted set <min distance between 0 and 1, 0.95 and above recommanded> <blur strength, 20 works pretty well>
(use this command to change your settings as well)

/nearsighted clear

If you find a bug, have a suggestion or want to talk, feel free to join my Discord server!