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A compression mount is a specialized type of rimless spectacle frame that secures the lens using focused pressure rather than screws or glue. The temple arms and bridge hardware feature small pins that are pushed through the lens and held tight by tension.
read more about compression mount eyeglass frame ...The tension holds the lens in place because the plastic hardware (often made of rigid nylon or plastic polymers) is slightly larger than the drill hole in the lens. When the pin is inserted, the resulting compression grips the lens and holds it firmly in position.
The main benefit is the minimalist aesthetic. Since there are no visible screws, the frame appears to float on the face. This provides a very clean, modern look and keeps the frame extremely lightweight.
The success of a drill mount depends on using the right lens material and precise cutting. The lens material must be strong enough to handle continuous pressure. The drill holes also need to be accurately sized and positioned to prevent the lens from cracking.
The structural integrity of your backup glasses is based on the lens material. A well-mounted compression frame is secure and lightweight. This comfortable, light frame is a good choice when your eyes are resting from contact lenses.
Yes, repairing a compression mount is difficult. If the lens is damaged, the entire lens must often be replaced by a specialized optician.
The frame itself is durable, but the lens is more vulnerable to breaking at the mounting points due to the constant tension.
The pins are usually clear nylon, rigid plastic, or sometimes a flexible metal.
Compression mounts use "bushings" or plastic plugs. If your frame feels wobbly, do not use glue to stabilize it. Glue can "attack" the lens material, causing it to become brittle and snap. An optician must replace the internal plastic plugs to restore a secure fit.
Optical Journal. Engineering of Compression Mounts (opticaljournal.com). 2024.
Review of Optometry. Troubleshooting Rimless Mounts (reviewofoptometry.com). 2023.
ABDO. Ophthalmic Frame Components (abdo.org.uk). 2024.
The Vision Council. Laboratory Finishing Procedures (thevisioncouncil.org). 2024.