My minecraft has a weird 3d effect?

My minecraft has been acting up lately. It seems to be zoomed in on the sides and zoomed out in the middle. I don't think it's a problem with super secret settings.

Actually it is probably super secret settings you can PROBABLY reset this by keep on pressing the setting button and if it doesn't work there might be solutions to your problem on youtube. Just look on youtube

Might be the FOV set to "Quake Pro". It so, set to normal and see what happens.