Kurt Andro – March 4th 2019
Glasses whose lenses can be switched between near, far and no correction and which differ as little as possible from ordinary glasses in terms of appearance, weight and wearing comfort.
Two semicircular glasses (one for near correction, the other for distance correction) are joined by a narrow center part to form a circular total glass.
The middle part is rotatably connected to the spectacle frame. In a horizontal position it snaps into place, so that in the lower half either the near or the far correction glass is placed in front of the eye.
Each of the two lenses can be folded forward 90 degrees at the middle bar.
Folding the lower lens makes it possible to do without correction in one or both eyes, which can be practical in certain visual situations. Folding down the upper glass can achieve a more pleasing look.
Note: All drawings are to be understood as schematic sketches and should clarify the functional principle. They say nothing about the final styling (shapes, colours, materials, etc.) of a design intended for production.
Questions to the community
- Do you think such glasses could meet the requirements for appearance, weight and wearing comfort?
- Would it be precision-mechanically functional yet lightweight and robust enough to be manufactured?
- Would you personally wish for such glasses or would you be rather embarrassed to wear them in public?
- Would you (tinkerer, precision mechanic, spectacle manufacturer, ...) like to develop the concept presented here into a marketable product? - Then please have a look at these Directions first. If it becomes a good (and affordable) product, I will be your first customer :-)
Please send answers, comments and questions to
I will publish a selection of the most interesting ones here (anonymously).