Flat top 28 bifocal lenses

Flat Top 28 bifocal lenses, commonly known as FT-28, are a specialized type of corrective eyewear designed to address the needs of individuals requiring assistance with both near and distance vision. These lenses are characterized by a distinct, flat-top ‘D’ shaped segment at the bottom, measuring 28mm in width, dedicated to near vision tasks. This segment seamlessly integrates into the rest of the lens, which is optimized for distance vision.

Flat Top 28 Bifocal Lens design

The design of FT-28 lenses focuses on providing a clear and efficient transition between near and distant vision. Unlike progressive lenses, which offer a gradient of vision correction, FT-28 bifocals have a clear demarcation line. This line distinctly separates the near vision segment from the distance vision area, making it easier for wearers to adjust their focus when shifting between different visual tasks.

Vision Clarity

The delineated segment for near vision ensures that users have a specific area for focused tasks like reading or detailed work, providing sharp and clear vision.

Wide Reading Area

The 28mm wide segment is larger than that of many other bifocal designs, offering a more extensive reading area which is beneficial for activities like computer work or crafting.

Ease of Adaptation

Many users find FT-28 bifocals easier to adapt to compared to progressive lenses, which require getting used to the absence of lines and the varying lens power.


Typically, FT-28 bifocals are more affordable than progressive lenses, making them an excellent option for budget-conscious consumers.

These lenses are particularly suited for individuals who engage in extensive near-vision activities, such as avid readers, those who work extensively with computers, or engage in detailed handiwork. They are also an excellent choice for individuals who have difficulty adapting to progressive lenses or are looking for a more budget-friendly bifocal option.

One of the key aspects of Flat Top 28 bifocal lenses is their durability and style flexibility. These lenses are crafted from high-quality materials designed to withstand the rigors of daily wear while maintaining their optical clarity. This makes them a practical choice for active individuals or those working in environments where eyewear can be exposed to more wear and tear.

Additionally, the FT-28 bifocals’ versatility in terms of style is remarkable. They can be fitted into a wide array of frame designs, from the classic to the contemporary, catering to diverse aesthetic preferences. This flexibility allows wearers to choose frames that not only meet their visual needs but also complement their personal style, ensuring that functionality and fashion go hand in hand.

When it comes to eye health and safety, FT-28 bifocal lenses offer several benefits. The clear division between the near and distance vision segments reduces the eye strain typically associated with continuously adjusting focus, especially during prolonged periods of close work. This can be particularly beneficial for individuals who are susceptible to eye fatigue or digital eye strain.

Furthermore, for those working in environments where eye protection is crucial, FT-28 bifocals can be incorporated into protective eyewear. This ensures that users do not have to compromise on their safety or visual clarity, as these lenses provide both protective and corrective functions.

comparison with Other Bifocal Lens Options



of Vision

Visual Transition


Cosmetic Appearance

double segment bifocal

Two ‘D’ shaped segments at top and bottom.

Clear vision both above and below.

Immediate switch between distances by shifting gaze.

Tradespeople needing clear vision in tight spaces.

Visible segments on the lens.

Lined Bifocal FT-28

Single segment at the bottom, typically 28mm wide.

Clear vision primarily for near tasks below eye level.

Sharp transition between near and far vision.

People needing clear near vision, less for distance.

Visible lines on the lens.

Progressive Bifocal

Gradient increase in power without visible lines.

Smooth transition across different vision ranges.

Gradual, seamless transition without image jump.

People desiring seamless vision without lens lines.

No visible lines, more cosmetically appealing.

In summary, Flat Top 28 bifocal lenses offer an excellent balance between functionality, comfort, and cost. They provide a clear and wide field of view for near tasks, are easy to adapt to, and are compatible with a wide range of frame styles. Whether you are new to bifocals or looking for an alternative to progressive lenses, FT-28 bifocals are an option worth considering. At RX Safety, we are committed to helping you find the perfect eyewear solution to meet your unique vision needs.

HOW TO ORDER Flat Top 28 Bifocals



RX Safety offers a wide range of eyeglasses, sunglasses, and safety glasses frames that are available with flat top 28 bifocal lenses. Choose your favorite one.

After choosing the perfect frame, click in ‘select prescription lenses’


select prescription

Inside our prescription form, you can select your prescription type. This is where you select Lined Bifocal FT-28.

MAKE SURE TO select ‘lined bifocal ft-28’ as youR prescription type



Select your preferred lens material, lens tint, and choose extra coatings to upgrade your lined bifocal FT-28 lenses. We also offer special coatings such as anti-scratch, anti-fog, and anti-reflective coating (AR) to improve the overall performance of the glasses.

select your preferRED lens color and coatings to upgrade your lenses


add your prescription

It is time to upload or fill your prescription information. Then you’re done! The rest is with us. We will work on your glasses with lined bifocal FT-28 lenses and deliver them to your address.

add your prescription information

flat top 28 bifocal glasses

Order prescription glasses featuring flat top 28 bifocal lenses.


Upgrade your glasses by replacing the lenses with flat top 28 bifocal options.

Segment Height for
Lined Flat Top Bifocal Lenses


Flat top 28 bifocal lenses


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