Most cyclists like to ride in wrap around sunglasses which eliminate light from the sides and stop grit getting into the eyes from all directions. The problem with wrap around styles, however, is the high cost of making a prescription lens to fit directly into the frame, especially if a mirrored finish is required.

In recent years, manufacturers have developed alternative options for cycling so that road cyclists and mountain bikers do not have to wear contact lenses with their favorite wrap around sunglasses, just so they can see the trail. The cheapest option is to buy prescription inserts or optical adaptors which clip neatly inside the frame. The downside to inserts is that grime and sweat builds up quickly between insert and frame, requiring frequent removal for cleaning. This in turn weakens the clip-in insert and the life of the sunglasses.

The alternative is to invest in more expensive prescription lenses made specifically to fit a particular frame, otherwise known as in-frame lenses. Options are more limited as not all wrap around styles can take a prescription lens and many mirrored lenses have to be custom made which can double the already prohibitive price.

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