High-end multi-focal contact lenses for up to 30 days continuous wear.
Since their release in 2006, PureVision Multi-Focal has quickly become one of the most popular multi-focal lens brands worldwide. Multi-focal contact lenses can replace varifocal glasses, or long distance and reading glasses in cases of presbyopia connected to short- or far-sightedness. The specially engineered material of the PureVision Multi-Focal originated in the PureVision Spheric lens. You can wear PureVision Multi-Focal lenses, with the consent of your eye doctor or optician, for up to 30 days and 29 nights continuously.
This is made possible by the introduction of the specially developed silicone-hydrogel balafilcon A. this material maximises the replacement of tear fluid, so that the eye is always supplied with sufficient oxygen. The low water content reduces drying out of the eyes and enables effortless wearing of PureVision Multi-Focal contact lenses without irritation or dry eyes.
The low maintenance required for PureVision Multi-Focal lenses is liberating for the wearer. The design of PureVision Multi-Focals reduces lack of focus and distortion in the field of vision. The ability to wear the lenses day and night, will spare you the daily bother of inserting and removing lenses and free you from cleaning and care problems.
Presbyopia is caused by an age-related process. This differs from astigmatism, nearsightedness and farsightedness, which are related to the shape of the eye and are caused by genetic and sometimes environmental factors. Presbyopia mostly occurs beginning at around age 40-45, when people experience blurred near vision when reading or working at the computer or other electronic devices such as tablet and mobile phone.
Presbyopia generally is believed to be caused by the gradual thickening and loss of flexibility of the natural lens inside the eye. These age-related changes occur within the proteins in the lens, causing the lens harder and less elastic over time. Age-related weakening also takes place in the muscle fibers surrounding the lens.
Over 1 billion people worldwide are believed to hav presbyopia so don't worry, you are not the only one!
No, both describe a very similar product and are related to the product naming of each contact lens brand.