Bifocals contain two lens powers; Trifocals have three.
Bifocals consist of two lens powers; Trifocals have three.
Bifocals have two regions of optical power, Trifocals have three.
The visible lines in bifocals and Trifocals are points where there's an abrupt
change in lens power.
Because of their advantages over bifocals and Trifocals, progressive lenses have become the most popular
multifocal lenses for anyone with presbyopia who wears eyeglasses.
These lenses have many advantages over bifocals and Trifocals, because they enable the owner to focus at different distances,
not just two or three.
These lenses have many advantages over bifocals and Trifocals because they allow the wearer to focus at many different distances,
not just two or three.
And progressive lenses or Trifocals, although they provide some help for intermediate vision, usually
don't have a big sufficient intermediate zone for snug computer work.
And progressive lenses or Trifocals, though they offer some help for intermediate vision, often
don't have a large enough intermediate zone for comfortable computer work.
And progressive lenses or Trifocals, though they provide some help for intermediate vision, typically
don't have a large enough intermediate zone for comfortable computer work.
And progressive lenses or Trifocals, though computerphile they offer some assist for intermediate vision,
often do not have a big sufficient intermediate zone for snug laptop work.
Progressive Lenses: These lenses have many advantages over bifocals and Trifocals because they allow the wearer to focus at many different distances,
not just two or three.
Progressive lenses, in some cases called“no-line bifocals,” get
rid of the noticeable lines of conventional bifocals and Trifocals and hide the fact that you need reading glasses.
Progressive lenses, on the other hand,
have many more lens powers than bifocals or Trifocals, and there's a gradual change in power from point
to point across the surface of the lens.
Instead of having simply two or three lens powers like bifocals or Trifocals, progressive lenses are true“multifocal” lenses
that supply a smooth development of many lens powers for all seeing distances.
Instead of providing just two lens powers like bifocals(or three, like Trifocals), progressive lenses are true"multifocal"
lenses that provide a smooth, seamless progression of many lens powers for clear vision across the room, up close and all distances in between.
Instead of providing just two lens powers like bifocals(or three, like Trifocals), progressive lenses are true"multifocal"
lenses that provide a smooth, seamless progression of many lens powers for clear vision across the room, up close and at all distances in between.