A progressive lens design is like a bi- or tri-focal lens in that it corrects more than one vision problem at a time. However, these lenses have no visible lines, improving the cosmetic appearance of your lenses while providing clear natural vision at all distances.
High index lenses
A thinner lens material, referred to as higher index lenses, can improve the comfort and cosmetic appearance of your lenses by allowing vision correction with a thinner and lighter lens.
You may want to consider Transitions photochromic lenses for your primary pair of glasses. They adjust automatically to changing light conditions to allow just the right amount of light to reach the eye. Transitions lenses are clear indoors and at night and get as dark as sunglasses outdoors, reducing glare, eyestrain and fatigue. They also block 100 percent of harmful U.V. rays, to help protect the health of your eyes now and in the future.
Impact resistant materials
Lenses made from impact-resistant materials help protect your eyes while watching or playing sports or working outdoors.
Anti-reflective treatments, or A/R, provide clear, sharp vision by reducing reflections off of your lenses.
Edge polish is a finish to the edge of a lens to make the thickness less noticeable.
Scratch resistant coatings
While many lenses have scratch resistant coating, a premium treatment can enhance durability.