Prescription insert frame

I am impressed with how well these work. It took about 3 hrs of riding with the TriEye bike glasses to get used to the subtle changes in orientation to get a good rear view, but now that I've mastered it I am not going back to handlebar, helmet or stalk mounted rear view mirrors. The TriEyes are also light, comfortable and provide good protection from wind and bugs.

Although this is a great rear view mirror replacement, it is not a substitute for rear facing radar. Many vehicles are so quiet that you will not notice them unless you happen to look back. I use a simple model that beeps when vehicles (including other cyclists) approach. This makes sure I am always aware of traffic approaching from behind. I can then check on details with the rear view mirror.

Advantages over other mirrors:
1) Mounted on your head so the image is not shaky. All the other mirror mount options I have tried result in too much relative movement of the mirror and eye to get a really clear image when traveling at significant speed (> 10 mph) on a road that is not perfectly smooth.
2) Only small adjustments from looking ahead are necessary to get a good rear view. This means I only have to take my eyes off the road for a split second, rather than the seconds involved in looking over my shoulder or concentrating on the shaky image in most mirrors. I find all I need is a slight tilt up of my head and a slight turn to the left (riding on the right hand side), while I look down at the mirror. Usually my mind focuses completely on the rear view image, but I am finding as I ride more that the eye without the mirror can also keep me somewhat aware of the road ahead. I am hoping this will become even more pronounced with more experience, as it would mean I would not miss important forward visuals for the fraction of a second I am looking behind.
3) The view when properly adjusted contains the top of my shoulder, providing a great reference point for where things are behind me.
4) The view is quite wide angle. On a wide 2 lane road I can easily take in both lanes behind me and the shoulder I am riding on.
5) Works well with my single vision lenses in the Rx insert. To use with multivision lenses (or bifocals) it would be important to keep the close-up corrections from impacting the bottom outer third of the lens used to look at the mirror.

Disadvantages:
1) It definitely took some practice to overcome 50+ years of looking over my shoulder or having to do a major refocus to use other mirrors. Some may find it difficult to adapt.
2) Photochromic lenses could have a larger dynamic range. I am not particularly light sensitive, but find they just barely get dark enough for bright cloudless days.

Flexible and fits all my TriEye lenses via the included snap-in nose piece. My Ophthalmologist is making up bifocal lenses that will fit perfectly into these frame inserts. I’m so happy I’ll be able see my cycling computer once again while bike packing for weeks at a time.

I cycle wearing a TriEye with photochromic lens and corrective insert; the TriEye sunglasses are superior: the best rearview-mirror system yet invented (and I've been cycling with mirrors for decades). The insert is functional and well-positioned. So...go for it!

I used my new TriEye's with the prescription insert for the first time today. It only took me about one mile to get the mirror dialed in and to get my eyes used to them. They perform better than I thought they would. I really like them a lot and will most likely purchase a second pair. Defiantly worth the money.