PinholeGlassesCesar

thingiverse

For presbyopia, they help to focus and in my case I use them daily. They don't feel like the crystals leave a different view, with the grid bothering a bit. The advantage is that you can read without problems and without effort with them and after a while they are no longer necessary. Be sure to consult your eye doctor. It is a combination of previous creations from this site, I list them now: https://www.thingiverse.com/thing:3663799 With those who could see better, he uses a hole diameter of 1 mm and the distance between them is 2 mm. Structurally they are very comfortable but to transpot them printed in PLA they break easily. https://www.thingiverse.com/thing:3089350 This model was the one that I found more attractive simple to print and more resistant to transport in the backpack for example. Because of the distribution of the points I could not see with them so well. https://www.thingiverse.com/thing:4362910 The author presents together with his model more technical data of why the diameters of holes and distances used. They are like in the first case I manage to see well with them but again to carry them in the backpack or a bag they are a little sensitive and are not foldable. Created with thinkercad https://www.tinkercad.com/things/jGz6oag2CXH