I use a frameless, compact, rectangular glasses u. Was also available with the seat. The comfort satisfied. She has covered the eyeglass field of view to ~ 95%. One can the retention mechanism on the nose naturally see something but does not really bother u. At a universal design also can not really avoid.
The essay is much more comfortable than the "1 - on eyewear design-Bille" to wear! The optical quality I would classify as better, and I have not changed here and throughout the film back. U. The statement is not so 100% objective.
If you let the u so far mentioned, conceptually not auszumerzenden, shortcomings in Page. The clip only to the "double-glasses" version compares one might even give 5 stars. But ...
... The biggest u. Only real problem is the choice of material of the mount. All the clips I've found on Amazon (also eg. The red-green, etc.) have the same cheap plastic construction (only the pressure clamp u. Of the "clamp-button" is made of wire with rubber caps). WIESOOOO ??? I would go 10 to pay extra if the whole Währe aluminum! Why you can find across the ratings of all clips: after some Benutzungs time, often in the not too distant future, so break very fine plastic grayling from the pressure exerted at the terminals U, the clip is so irreparably damaged.. I can associate myself with the negative experiences. For me, it took a red-cyan glasses with exactly the same mechanism by 20-30 clamps.
Conclusion: Optical and functional 4-5 stars ... as long as it works ....
