Full-rim, half-rim, and rimless are the three basic frame constructions, and while the visual difference is obvious at a glance, the practical implications for durability, weight, and prescription suitability are worth understanding properly before choosing between them.
Full-rim frames
Full-rim frames enclose the entire lens in frame material, offering the most structural support and durability of the three constructions. They handle a wider range of prescription strengths comfortably, since the rim visually and physically contains any lens edge thickness, and they tend to be the most forgiving option for everyday, heavy use. The trade-off is more visible frame material and generally more weight than the alternatives.
Half-rim (semi-rimless) frames
Half-rim frames use a rim across the top of the lens, with the bottom edge held by a thin wire or nylon line. This offers a lighter, more open look than full-rim while retaining more structure than fully rimless designs. They suit moderate prescriptions reasonably well but are more vulnerable at the unsupported lower edge than full-rim frames, particularly to impact or pressure from that direction.
Rimless frames
Rimless frames skip the rim entirely, with temples and bridge attached directly to the lens, usually through small drilled holes. This produces the lightest, most minimal look of the three, letting the most of the face show through. It’s also the least structurally durable option and generally best suited to lighter, thinner lenses rather than strong prescriptions with thicker lens edges.
Choosing between them
Heavier daily use, stronger prescriptions, and a preference for durability generally favour full-rim. A lighter, more minimal look with reasonably moderate prescription needs suits half-rim well. Rimless suits mild prescriptions and anyone prioritising the lightest, most understated look above all else. None is objectively superior — it comes down to matching the construction to your actual prescription and how hard you’ll be on your glasses day to day.