Around the age of 40-45, objects at a person’s reading distance become blurry, threading needles or fine handiwork becomes difficult, reading books is easier when held further away. As we get older, we begin to notice that objects in the middle distance are becoming blurry as well, making it difficult to read the computer screen or see prices in the supermarket. This phenomenon is called Presbyopia which is the age-related hardening of the crystalline lens in our eye, making it difficult to bend light rays and focus them clearly on the retina.
Reading glasses will sharpen close vision but will make distance viewing blurry. When someone requires both distance and near vision correction, multifocal lenses provide an advanced solution.
Think about a multifocal lens as it is horizontally divided in 3 portions (near, intermediate and distance) so you can use it as an all-around solution all day, every day. Due to the technological advances, progressive multifocal lens designs not only correct vision at all viewing distances, but also incorporate a blending technique to shift the power across the lens without visible lines separating the zones or sudden change in power.
The Perfection Series EveryDay and EveryDay Wide lenses are created by world-leading technologies and state-of-the-art equipment to provide enhanced visual performance, wide fields of view, thin and light lenses and less distortion (compared to EP1 Progressive design) when looking through the outer edges of the lenses.
This “peripheral blur”, called aberration is due to the fact that more than one vision-correcting power is incorporated into a single lens.