Eyeglasses come in a variety of types. This includes a single-vision lens
with one power or strength over the entire lens or a bifocal or trifocal lens
with multiple strengths over the entire lens.
But while the latter two are options if you need a different strength in your
lenses to see far and near objects, many multifocal lenses are designed
with a visible line separating the different prescription areas. If you prefer a
no-line multifocal lens for yourself or your child, progressive reading
glasses or Progressive Additional Lens (PAL) might be an option.
PALs are a type of multifocal lens specifically for people who need
corrective lenses to see distant and close up objects. To put it plainly, these
lenses allow you to see clearly at multiple distances without a bifocal line.
The need for a progressive lens increases with age. By the age of 35 or 40,
many people have difficulty focusing their eyes on nearby objects. This is
known as PRESBYOPIA, and to compensate for this focusing problem,
some people wear single-vision eyeglasses for distance, as well as reading
glasses for close up.
While this approach can work, PALs provide a simpler, more convenient
solution to age-related vision problems:
● The upper section of a progressive lens provides the strength you
need to see clearly in the distance.
● The lower section provides the strength you need to see clearly up
● The middle section helps you see clearly at intermediate or middle
These lenses provide a gradual transition in strength from top to bottom.
Advantages of Having Progressive Reading Glasses
Only Need One Pair of Eyeglasses
Some people find that a progressive lens is better than a single-vision lens
because it allows them to see clearly at different distances without the need
to carry a second pair of eyeglasses.
A progressive lens does the job of a single-vision lens and reading glasses
so that you only have one pair of glasses on hand.
No Unsightly Bifocal Line
Progressive lenses offer the benefits of a multifocal lens without a
multifocal line. And since there’s a gradual shift in lens strength with a
progressive lens, you don’t have to deal with any sudden changes in clarity,
which are common with multifocal lines.
Modern, Youthful Appearance
Bifocal and trifocal eyeglasses are sometimes associated with old age. So
wearing eyeglasses with a bifocal line may make you feel self-conscious.
You might feel more comfortable with a progressive lens since there isn’t a