How are close-set eyes defined?

Close-set eyes are defined as having a distance between them that is less than the width of one eye. This characteristic means that when observing the facial proportions, the space between the inner corners of the eyes is narrower than the measurement from one eye to the other. This alignment can impact various aspects of makeup application and aesthetic treatments, as professionals may tailor their techniques to enhance or correct the appearance of close-set eyes.

In terms of the other definitions, the other options describe different spacing configurations that do not align with the specific criteria for close-set eyes. The essence of the definition is rooted in the comparative measurement that defines close-set eyes distinctly, thus allowing beauty professionals to understand the nuances in eye positioning.