Differences between progressive vs. bifocal lenses: Which one to choose to correct your vision?

Presbyopia is not synonymous with old age, especially because technological and scientific resources in the design of prescription glasses allow us to move towards vision as good as that of a 20-year-old.

There are many types of glasses, and among them are glasses for presbyopia. Progressive glasses are one of our best options for treating presbyopia, but before them there were bifocals.

At Optica Bassol, we tell you the difference between progressive and bifocal glasses, as well as their history and current advances. Write down their characteristics so that you can always make the best decision for your visual health.

Differences between progressive and bifocal glasses

In the following table we summarize the most important differences between both types of glasses for presbyopia.

Bifocal glasses, what are they?

The history of bifocal lenses dates back to the 18th century, when Benjamin Franklin (1706-1790) devised a system to correct presbyopia. His ingenious solution consisted of cutting two lenses of different prescriptions and joining them with a metal frame, which gave rise to the first bifocal spectacles.

The upper part of the lens was graduated for distance vision, the lower part for near vision.

Although this design was rudimentary and had some limitations, such as the visible line separating the two vision zones, it was a breakthrough for people suffering from presbyopia, allowing them to see clearly without the need to constantly change glasses.

Evolution and refinement of bifocal spectacles

Throughout the 19th and 20th centuries, bifocal lenses were perfected. New materials, more ergonomic designs and optimized prescriptions were introduced to provide greater visual comfort and precision.

However, the visible line separating the two vision zones remained an aesthetic drawback and limited vision. The advent of progressive lenses was a leap towards natural vision.

Progressive lenses, what are they?

In the 1950s, a new milestone in presbyopia correction materialized with the invention of progressive lenses.

Progressive glasses, or multifocal lenses, offer clear vision at all distances (near, medium, far). They consist of a lens designed to correct presbyopia, an eye condition that affects the ability to focus on near objects as we get older (after the age of forty).

Unlike bifocal glasses, which have visible lines separating vision zones (bottom for near, top for far), progressive glasses offer an organic transition of prescription, thus providing more natural vision at all distances.

How do progressive glasses work?

There are different types of progressive lenses with different fields of clear vision and technologies. The surface of progressive lenses is modified by a process of digital carving or aspheric molding, creating a variable curvature that gradually changes over the length of the lens.

This variable curvature allows the lens to focus light differently in different areas, providing clear vision for distant, intermediate and near objects.

Progressive lenses are a solution for people who need glasses for both near and distance vision. Also for people who, in addition to presbyopia, have another visual condition such as nearsightedness, astigmatism or farsightedness.

What is the field of vision of progressive glasses?

The field of vision in progressive glasses refers to the area of the lens through which the wearer can see clearly at different distances. One of the main differences between progressive and bifocal spectacles is that progressive spectacles offer a gradual transition between near and far vision, so they offer a wider field of vision.

Factors influencing the field of vision in progressive glasses

The field of vision in progressive glasses can vary depending on several factors, such as:

• Lens design: digital progressive lenses usually offer a wider field of vision than traditional progressive lenses.
• Glasses frame: The shape and size of the frame can also affect the field of vision. An appropriate frame, such as those that are straighter at the bottom, maximizes the field of vision.
• Visual needs of the wearer: Some people only need glasses for reading.

How do you know if progressive glasses are not working properly?

If you suspect that your progressive glasses are not working properly, pay attention to the following signs:

• Blurred or distorted vision: if you notice this in any area of the lens, especially when switching from far vision to near vision or vice versa, it may be an indication that the glasses are not graduated correctly or that the frame does not fit your face properly.
• Difficulty focusing: If in situations such as reading or using the computer, it is difficult to focus your eyes, it may be that the intermediate or near vision areas of the lenses are not properly graduated.
• Dizziness or headaches: if you experience these symptoms after wearing your progressive glasses for a while, it may be a temporary side effect while you adjust to the lenses.

Progressive vs. bifocal glasses: Which glasses to choose to correct your vision?

The best choice for presbyopia depends on your needs. However, in terms of quality and comfort, progressive glasses are the best choice.

The Best Frames for Progressive Spectacles

The factors we have indicated in the field of vision are decisive in choosing the ideal frame for you. Here are three models to give you an idea of the endless possibilities:

1. Prada PR A19V 17N1O1 52

This Prada model with its straight line at the bottom provides sharper close-up vision. The frame is wide, so you'll have a favorable field of vision at all distances without losing an ounce of glamour. Get them in the following colors:

• Havana
• Havana clear
• Clear
• Black
• Transparent Pink

2. Ray-Ban RX7239 ALAIN 8257 54

Enjoy spectacular Ray Ban glasses at a gift price with this frame, ideal for a progressive. Do not hesitate and try them at Óptica Bassol! Take them in any of the following tones:

• Gray
• Blue
• Transparent

3. Tom Ford FT5941-B 001 55

These Tom Ford glasses are made of superior quality injected material, which guarantees their flexibility and lightness. The rectangular shape is ideal for progressive glasses, so enjoy them! Available colors are:

• Black
• Havana

Conclusion

Presbyopia is just another stage in our lives, and we can overcome it with style and elegance. If you have symptoms of discomfort with your progressive glasses, consult your ophthalmologist.

The ideal way to avoid problems with your glasses is to have them designed by a professional. In Optica Bassol we advise you in the selection of your presbyopia glasses and sunglasses.

Visual health is important and has multiple allies. Come to Óptica Bassol, you will find your dream glasses in any of our branches, or place your order online and enjoy the seasonal offers.Don't let presbyopia prevent you from living the best life!