Train your eyes - Pinhole glasses

grabcad

Pinhole glasses. If you've never heard about them, they're a device used in the medical field to train your eyes, especially now that we spend so much time in front of a screen. I won't be listing the benefits, but here's where you can look: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5383620/. These ones posted here haven't got medical approval, but I've replicated the same dimensions as researched and commercial ones. Hole size has to be between 0.9-1.2mm, hole distancing has to be 2-3mm, and pattern on lenses should be regular and perfectly symmetrical. I'll be investigating more studies about them in the meantime. Be sure you print them with the lenses on the print bed for a perfect regular hole shape. Fine-tune your printer (flow rate, horizontal expansion, holes compensation) because precision of the holes is essential and the main point of this device. If you want a pair like this with different shapes or sizes or hole spacings, contact me. Be sure to read usage guidelines before using them and do it at your own risk. Here's some more info: https://www.healthline.com/health/pinhole-glasses. Just Google them too. I hope you like them and enjoy them. If you want to leave a tip: https://ko-fi.com/lundreu