Larger glasses tend to slip and slide down your nose and eventually fall off. These easy to print ear hooks will prevent that from happening.
I highly suggest that you print them with some sort of flexible material, the softer the better. PLA might be too hard on your skin.
You will find three versions; hook is the largest and creates a super strong grip. Small hook is an improved version that is smaller to prevent fatigue, but still grips strongly. Ring is smallest and not useful for sports, but works perfectly for daily use. The ring is my favorite option and what I use 99% of the time.
I have also provided a blank version for each design. You can upload the blank to Tinkercad and easily create a hole with the correct size for your glasses.
I've also made a video if you want to see more details and how it works:
Only the "small hook" model requires supports, you can print everything else without them. The hole for the glasses should print fine without the supports, as the bridging is very short.