What are Progressive lenses?
A progressive lens is an amazing piece of engineering, allowing multiple vision fields to be incorporated into a single lens without any clear distinction between the fields themselves. The power in the lenses "progressively" changes from far-to intermediate to your full reading power. This is why progressive lenses are often referred to as "no-line" bifocals or trifocals.
And it's why progressive lenses are ideal for patients who have presbyopia – a vision condition marked by a decrease in the ability to focus sharply on nearby objects.
As we age naturally, our ability to see nearby objects and objects in the distance can decrease. Progressive lenses address separate visual needs in one lens – usually with a "distance viewing" field build into the upper portion of the lens and a "near vision" field built into the lower portion. Rather than a line separating these areas, they are "blended" together, often with the middle portion of the lens serving as intermediate vision correction when necessary.
Unlike traditional bifocals or trifocals, there are no visible lines separating the different fields of a progressive lens. Your eyes are seen clearly behind the progressive eyeglasses, you've got the same "look" as eyeglass wearers often half your age, and there are no "lens lines" to distract your vision.