1) for near seeing,
Our low vision magnifiers have 2.5x, 3.0x, 3.5x, 4.0x, 5.0x, 6.0x,
Working distance (focus length) have 340mm, 420mm, 500mm, 550mm for different application.
2) for far seeing,
Our low vision products for further seeing have 2.0x, 3.0x, adjusting focus, adjusting pupil distance.
The nearest distance is 1m, to far away.