Blur Horizon / Diopter Bubble Visualizer
Read about the concept here.
tl;dr: Your glasses diopters, relative to your actual myopia, determine how far you can see clearly.
If you are wearing less diopters than your actual nearsightedness, you can see clearly – just less far.
This concept is core to premises like the differential glasses.
You want the diopters to give you a blur horizon where you see clearly (no “under correction”), but also offer a bit of active focus challenge.
With the visualizer you can:
1) select your actual diopter (glasses you need for fully clear vision)
2) move the diopter slider below, to change the power of the lens
To get a relative representation how the diopter bubble grows and shrinks, depending on the diopters you wear.