In which condition do the bottoms of the eyewires extend further out than the tops?

In the context of eyewear and frame adjustments, a negative face form refers to a situation where the bottoms of the eyewires extend further out than the tops. This design is often utilized to accommodate certain facial shapes or to enhance the aesthetic appearance of the eyewear. By extending the bottom of the eyewires outward, the frame can better align with the natural contours of the wearer’s face, offering a more flattering fit and improved comfort.

When considering the other conditions, positive face form involves the tops of the eyewires being further out than the bottoms, which is the opposite of what occurs in a negative face form. Pantoscopic tilt relates to the angle at which the lenses are tilted forward, which affects how the lenses align with the eyes, and does not specifically address the relationship between the tops and bottoms of the eyewires. Similarly, retroscopic tilt is a backward tilt of the lenses away from the face, again not relevant to the positioning of the eyewires.

Understanding these distinctions is crucial in the field of ophthalmic dispensing, as choosing the right frame features can significantly influence both the fit and function of the eyewear for individual patients.