Side Effects Of Progressive Lenses
By Essilor News
Progressive lenses are used to correct presbyopia, the loss of the eye's ability to focus on near objects. Sometimes referred to as no-line bifocals, progressive lenses have three visual fields for viewing distant objects, intermediate objects and close-up objects. More viewing fields allow the wearer to see clearly at all distances. With plenty of advantages, progressive lenses also come with a few temporary disadvantages.
Many people have a difficult time adjusting to the different lens powers in progressive lenses. If wearers are not used to multiple changes in lens power, progressive lenses can make them nauseous and dizzy at first. Another disadvantage is that peripheral vision can be slightly altered by the changes that occur at the edge of progressive lenses. This distortion in viewing is often referred to as a "swim effect."
Fortunately, new technology in progressive lenses is helping decrease some vision-altering effects. By completely reengineering the fundamental structure of progressive lenses, technologies used to produce Varilux S Series lenses can reduce the swim effect by up to 90 percent. Presbyopic patients can finally enjoy wearing their eyeglasses - virtually eliminating the negative side effects.