semirimless

Semirimless, often written as semi-rimless, refers to a type of eyeglass frame design in which the lenses are surrounded by a partial rim. In typical configurations, the upper portion of the lens is encased in a conventional frame or bridge, while the lower edge is held in place by a slender wire or nylon line. Some designs reverse this arrangement, with a top edge unscreened and the lower portion framed.

Construction and variations: Semirimless frames balance a framed upper half with an exposed lower edge. The lens is usually anchored at the lower perimeter by a wire or mounting thread that provides stability without a full bottom rim. Materials commonly used include metal alloys, stainless steel, and lightweight polymers. The results can range from a sleek, minimalist look to a more traditional silhouette, depending on the thickness of the upper rim and the visibility of the securing mechanism.

History and market presence: Semirimless designs emerged as a middle ground between full-rim and rimless frames, offering a compromise of aesthetics and weight. They have been produced by various eyewear manufacturers and marketed under different names, with configurations that suit both prescription lenses and fashion eyewear.

Care and considerations: Maintenance efforts focus on keeping the securing wire or mounting clean and free of debris, and ensuring the attachment points remain tight. The exposed lower edge can be more susceptible to chipping or edge wear compared with full-rim frames, while the upper rim maintains most of the lens support.

See also: Eyewear design, Rimless glasses, Full-rim glasses.