Keepons eyeglass retainers: engineered silicone

Do you want to know why Keepons eyeglass retainers were engineered using silicone?

It’s because of silicone’s properties. It can be stretched and then return to it’s original shape.

This is very important because of the way your eyeglasses are designed. For example, there is a wide variety of temple tip types.

Some temple tip types are narrow and of a consistent width, for example the entire tip is 3-4mm in width. These aren’t so common.

More common are temple tips that start off wide and then taper to become narrower as the tips get close to the front of your glasses. For example, the temple tips may be 8-10mm in width and then narrow done to about 4mm at the point that it meets with the temple arm.

Such inconsistency in width dimensions makes designing eyeglass retainers very difficult. For example, the original Keepons design calls for it to be boomerang shaped with a narrow aperture running through the center of it. This allows it to be threaded over the temple tips and then the protruding part hooks over your ears so they don’t slip.

But if you make the aperture too narrow you won’t be able to get it past the wide point of the temple tip. But if you make it too wide, it won’t sit properly once it gets to the narrow part of the temple tip.

Hence, silicone is used for its property of stretching only when it is sufficiently forced to do so, and then within minutes retain its original shape. This makes it perfect for the majority of temple tips. But not any silicone will do. The silicone for Keepons had to be specially formulated so it could be stretchy enough to get past wide temple tips but rigid enough to adhere to the tip and not move about.

In exceptional cases where the temple tip is just too wide, one can separate the temple tip from the temple and then thread the Keepons over the narrow end of the temple tips then reattach temple tip with temple arm.

Or in the case where the temple arm and temple tip are permanently joined, one can use a screwdriver and remove the temple from the frame and then thread the Keepons over the other end of the eyeglass temple arm.

Whatever shape your temple tips take, a lot of thought has been put into designing Keepons with one overriding purpose: to stop your eyeglasses from slipping. Nothing more and nothing less.

Keepons are the science of stopping slipping glasses.

Keepons keep your glasses on.