This device was inspired by a story of Isaac Newton pressing on his eyes in different ways to see the effect it had on his vision.
The Ocular Pressure Magnifier requires only a light but firm press up to and around the eye, in order to increase magnification. However, there is a sweat spot that you will have to find, that will be a balance between angle and the pressure that is applied to the area around eye. The focal distance for the best magnification and clarity is about 3 inches between the bottom of the magnifier and item being looked at. Don't get discouraged if you do not get it right away, it will take some time to hone in your hot-spot.
The increase in magnification can be tested with the "This is a test" image I uploaded.