For those of us who wear glasses, being without them is a no-go! My old pair broke a while back, but I decided to "see" if I could fashion a repair using Tinkercad. I appreciate that these aren't suitable for everyone, as they only suit the lenses I had to work with, so here is the process and end result. For those that have them, the frames these lenses came out of are a "Specsavers Titan".

For those wanting to attempt a repair themselves, these are the steps I took using Tinkercad:

1. Take the lens and trace around it onto a bit of plain white paper. Scan it and load it up on your PC or Mac.
2. Tidy up the picture to give a neat-ish outline of the lens - I used Paint3D in Win10, but any app will do - you want to remove any background dust and the like, and fill the outline to a solid shape with the bucket tool.
3. Use a convertor like convertio.co to convert the .jpg/.png image of the lens into a .svg file. Just google “convert png to svg” and you'll find a site to do the job.
4. Once the .svg is downloaded, fire up Tinkercad and import the svg. It is likely very big, so scale it at the import screen, just to get it into Tinkercad
5. Once I had mine in Tinkercad I sized it down to the dimentions of my actual lens. I found that the edges of my hand traced image were quite rough, so I used the circle tool to smooth out the lens and then combined it into a single smooth piece the size and shape of the lens - I uploaded a few images of Tinkercad to show what I mean.
6. With the lens shape there, I now duplicated it several times, resized it and aligned it to make the cavity of one side of the frame.
7. Once I was happy with the single eye piece, I duplicated it and mirrored it for the second side, spacing it out to the overall width of the old frames.
8. From there, I used the standard shapes to build the arms and the nose piece.
9. To hold it all together, I made parts on the arms and nose piece overhand into the frame section so that they could hold the lenses in place once assembled.
10. When happy with the outline, I printed the parts flat - I could see that the lenses are curved, but rather than try to design the frames to match the curve, I printed them flat and heated the bed up to 75 degrees to allow me to shape the frames to the lenses after they were printed - this worked okay, but wasn't perfect.
11. Three small screws hold the arms and nose piece to the frame.

All in all, these were a fun repair that took an afternoon to create in Tinkercad and to print. I printed them at .2 layers with 100% infill.

I went bright yellow because I didn't want a pair of black frames that just look terrible - the yellow ones get lots of comments, like “what's with the glasses” and it's always a great conversation starter to say “You like them? I printed them myself”