Unisex eyeglasses are a type of eyewear design that breaks traditional gender-based styling, focusing on neutrality, simplicity, and balanced aesthetics. Instead of emphasizing feminine or masculine design elements, they use balanced frame proportions and universal fit structures to suit different genders and face shapes.

Unisex eyeglass frame selection follows the "complementary balance principle," using frame shapes to enhance facial proportions. Round faces suit square or rectangular frames for added definition; square faces suit round or Boston frames to soften angles; long faces suit oversized or bridge frames for better proportion balance; heart-shaped faces suit bottom-heavy frames to balance facial structure. The goal is to achieve harmony between frame shape and face shape for a more natural and stylish look.