Half rimless and fully rimless glasses are often confused or grouped together, but they are different constructions with different aesthetics, different strengths, and different use cases. If you are considering frameless eyewear and trying to decide between the two, this guide covers everything you need to know.
Half Rimless: How They Work
Half rimless glasses — also called semi-rimless or browline frames — have a metal or acetate rim along the top edge of each lens, with the bottom half of the lens unframed. A nylon or monofilament cord sits in a groove cut into the bottom edge of the lens, holding it in place from below. The result is a frame that covers the upper lens edge (the part nearest your eyebrows) while leaving the lower edge open.
The visual effect is distinctive: the top rim creates a strong horizontal line at browline level, while the lower half of the lens appears frameless. This gives the face both structure (from the top rim) and lightness (from the open lower half).
Fully Rimless: How They Work
Fully rimless glasses — also called three-piece or drill-mount glasses — have no surrounding frame at all. The bridge is mounted directly to the lens via screws through drilled holes, and the temples attach to the outer edge of each lens the same way. The lens is held entirely by its drilling points, with no rim, cord, or groove.
The visual effect is complete minimalism: the lens appears to float on the face, connected only by a sliver of hardware at the bridge and outer edges. There is no visual frame to speak of — only the lens shape itself.
Key Differences
Visibility: Half rimless is more visible — the top rim creates a defined line across the face. Fully rimless is less visible — the only hardware is at the bridge and temple connection points.
Structure: Half rimless is more structurally robust — the top rim holds the lens firmly along its full upper edge. Fully rimless depends entirely on the drill points, which requires more precise manufacturing.
Lens replacement: Half rimless lens replacement is straightforward — the cord is removed, the lens replaced, and the cord re-threaded. Fully rimless requires drilling new holes in the replacement lens, which takes more time and skill.
Prescription range: Half rimless accommodates a wider prescription range more easily. The top rim stabilises the lens regardless of prescription power. Fully rimless works best with high-index lenses for stronger prescriptions.
Aesthetic: Half rimless is more structured and traditional — the top rim gives the face definition. Fully rimless is more minimal and contemporary — nothing interrupts the face.
Which Should You Choose?
Choose half rimless if: you want some frame definition, you have a stronger prescription and are concerned about lens stability, you want easier lens replacement, or you prefer a more traditional professional look.
Choose fully rimless if: you want the most minimal, invisible glasses possible, you value maximum lightness, you want a contemporary or luxury aesthetic, or you are drawn to the look worn by Steve Jobs, LeBron James, or Joe Burrow.
At FrameZero we specialise exclusively in fully rimless glasses — the most minimal construction possible. Browse our collection or read our complete guide on what are rimless glasses.