Blocks appear to have a white outline around them.

Whenever I load up a new world, whether it be online or singleplayer, every time I turn a full cardinal rotation (North, South, East, West) I see white (for the most part) outlines on blocks about 5 blocks away or farther. I have a hunch that this is causing the lag spikes I am experiencing, as I haven't had lag before this issue occurred. While this does not affect gameplay, it is very disorienting, and it can cause a lot of lag. Due to this issue I have been staying clear of Minecraft waiting for an update, but recently I fear people may not be aware of this issue. As far as I'm concerned, it does not pop up in the "legacy" versions of the game, but in almost every new version it appears to be everywhere I turn.