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An eyeglass retention cord is a functional strap, cord, or band that connects the temple arms behind the wearer's head. Unlike a decorative chain, the cord is designed to hold the glasses firmly against the head, preventing them from falling off during vigorous activity.
read more about eyeglass retention cord ...The cord provides security by using friction and tension. The cord wraps around the back of the skull, and often includes an adjustable bead or lock that cinches the cord tight. This ensures the frames do not move or slide, even when the wearer is sweating or moving quickly.
Retention cords are primarily used for sports, boating, running, and industrial safety. Any situation where the wearer needs maximum security to prevent the frame from slipping or being knocked off benefits from a retention cord.
Retention cords are made from durable, water-resistant materials like neoprene, thick cotton, or strong cord. Materials often include rubber or silicone ends to grip the temple arms securely.
The high security of the retention cord protects your eyes. If you wear corrective contacts during sports, the cord makes sure your protective eyewear stays secure, safeguarding your eyes from wind, debris, and impact that could damage your contacts.
Yes, the terms are often used interchangeably, but "retention cord" usually suggests a tighter, more functional design for sports use.
Yes, most designs have a sliding lock mechanism that allows the wearer to tighten the cord around the head as needed.
It depends on the helmet. Some cords are too bulky to fit comfortably under a tight helmet or headgear.
In high-contact sports, a retention cord is a medical necessity to prevent your glasses from becoming a projectile. Ensure your lenses are made of polycarbonate or Trivex; even with a cord, standard plastic lenses can shatter upon impact.
AAO. Eye Safety for Athletes (aao.org). 2024.
ASTM F803. Standard Specification for Eye Protectors (astm.org). 2024.
Review of Optometry. Sports Vision and Safety (reviewofoptometry.com). 2023.
National Eye Institute. Sports Eye Safety (nei.nih.gov). 2024.