The loss of the eyes ability to accommodate is part of the natural ageing process. From birth onwards the human lens slowly loses elasticity and thus the ability to focus sharply at different distances. However, the reduction of the accommodation ability in people with normal sight does not normally become noticeable until the age of 40 - 50.
Wearing reading lenses is one option to correct presbyopia. However, constantly putting lenses on and taking them off can be very inconvenient in everyday life. The ideal solution are progressive lenses: they offer sharp vision for both close and distance view.
A presbyopic eye
A corrected presbyopic eye
Progressive lenses are manufactured using the latest technology. They stand for very high quality and are extremely well tolerated. Optiswiss offers the right lens for every requirement, from standard progressive lenses up to high tech premium lenses.
Standard progressive lens
Quality progressive lens
Individual progressive lens
In addition to the prescription values, conventional progressive lenses use average values for calculation of the design. Those values are 32,5mm for pupil distance, 9° for the pantoscopic angle, bow angle 5°, 14,5mm for corneal vertex distance and 38 cm for near object distance. But since each individual has a different, individual behavior, the results are not always optimal.