Originally which French term describes "to deceive (fool) the eye"?

The French term meaning “to deceive (fool) the eye” is 'trompe l'oeil'. Objects can be in sharp focus and delineated with meticulous care to create an artwork (painting, mural, sculpture, architectural interior) that almost fools the viewer into believing that specific images are actual objects. In fashion, a shirt on a display model can look like a three piece top, when in actuality it's just a single tee shirt.

When the technique of 'trompe l'oeil' is used, it is one involving extremely realistic imagery in order to create an optical illusion that will truly depict objects appearing in three dimensions. True realistic items falling within the meaning of 'trompe l'oeil' can have a viewer thinking a space is bigger than it is, a curtain is partly concealed in a painting, or a wall has depth and warmth because wallpaper is printed to scale with weathered bricks that have texture and true rustic tones.