Or a progressive lens with a large middle section for computer work could be used.

The idea of the progressive lens came to him as he tried on his father's bifocal lenses.

For those new to progressive lenses, an accommodation period is often required because the brain needs to learn to adapt to them.

Aves' patent included the progressive lens design and the manufacturing process.

Fitting has become more critical with the variable-focus or progressive lenses."

Gradients should not be confused with bifocals and progressive lenses.

Trifocals are becoming rarer as more people choose to wear progressive lenses.

He peered at Laurie through his newly acquired, rimless progressive lenses.

But it would take a full week to make progressive lens and and the eye glass frame selection was meager.

However this was unlike modern progressive lenses.

After patents and calculations, this type of progressive lens appeared to be possible, but had yet to be manufactured.

The typical progressive lens is produced from a so-called semi-finished lens.

In 1993, Varilux Comfort was launched and became the world's best-selling progressive lens.

Early progressive lenses were relatively crude designs.

However, due to this patent, Essilor will never be able to say that they created the first Progressive Lens.

Essel's breakthrough came in 1959 with the invention of Varilux, the first ophthalmic progressive lens.

Rodenstock invented the modern progressive lens.

It is advised that, when these symptoms set in, the progressive lenses are removed for a short period and replaced after symptoms have subsided.

In some studies, bifocal and progressive lenses have not shown significant differences in altering the progression of myopia.

Returning to an older prescription or different type of lens design (bifocal, trifocal) only serves to increase the adaptation period to the progressive lenses.

In the mid 1970s, Essilor focused on becoming a true optical group specializing in the plastic progressive lens.

Multifocal contact lenses are comparable to bifocals or progressive lenses because they have multiple focal points.

Without much brainstorming, Maintenaz's progressive lens was given a name following suit with the other premium products: Varilux.

The Varilux Physio progressive lens is characterized by an improvement in colour contrast and wider fields of vision.

Progressive lenses can use the optimization principle, which is based on linearization and represents the lens surface using special spline functions.