Minecraft wiki entry for Blindness, associated text: Blindness impairs the player's vision as if a thick black fog were surrounding them, with only the immediate area being visible (this means that only a few blocks directly around the player are visible to them). However, the sun and moon can be seen as normal.‌[Java Edition only] Additionally, liquids do not fade into the fog perfectly. The effect also prevents the player from sprinting or inflicting critical hits, but does not stop an ongoing sprint. If combined with Night Vision, the screen appears completely black aside from the sun and moon.[1] From Java Edition 1.15 to Java Edition 21w08b, combining with night visions renders the HUD text black (this also happens on the title screen)[2]. In Bedrock Edition, it adjusts correctly: it keeps the black fog, and renders the visible area with night vision.