What effect does contouring on each side of the nose create?

Contouring on each side of the nose is primarily used to create the illusion of a slimmer or thinner nose. By applying a darker shade of makeup or contour product along the sides of the nose, it visually narrows the width, as the darker colors recede into the background. This technique enhances the appearance of defined contours, drawing the eye away from the width of the nose and creating a more elongated and refined look. The optical effect of shading is a fundamental principle in makeup artistry, allowing for the transformation of facial features through strategic application.