I had Re Installed windows 10 a while ago, When my pc came back to me I Installed Minecraft, Java & Optifine. When I launched the game ALL AA Had disappeared, I don't know what happened but I cannot see properly after two blocks. after that I had deleted Minecraft with all of its files to be sure that it wasn't optifine, it wasn't optifine. a couple of weeks ago I reinstalled windows 10 again thinking that it may have been the problem. again nothing has changed. I have tried looking online for a soluting but nothing helped. I tried reinstalling drivers, Reinstalling windows, and a lot of other fixes that just didn't work.
Here is a screenshot where you can clearly see the difference from any other player. There is literally no AA.
It's also very hard to see the names of NPC's and Players.
This Affects ALL Minecraft versions.