Flat top 28 bifocal glasses lenses offers correction for both near and far distances. It is a multifocal lens commonly prescribed for those suffering from both presbyopia and hypermetropia, a condition whereby, with age, the eye exhibits a progressively diminished ability to focus on near and far objects. The flat top lens includes a segment at the lower half of the lens with a prescription for reading (near distance). The width of the flat top 28 bifocal is 28mm wide at the top of the bifocal and looks like the Letter D turned 90 degrees.
Because the flat top 28 bifocal lenses are one of the easiest multifocal lenses to adapt to, it is one of the most popular bifocal lenses in the world. It’s distinct “jump” from distance to near vision gives wearers two well-demarcated areas of their glasses to use, depending upon the task at hand. The line is obvious because the change in powers is immediate with the advantage being it gives you the widest reading area without having to look too far down the lens. It is also easy to teach someone how to utilize the bifocal in that you simply use the top for distance and the bottom for reading.
What is Segment Height?
The segment height is the distance (in millimeters) from the bottom of your lens to the top (or beginning) of your bifocal. For lined (Flat-Top) bifocals, your segment height is generally measured from the bottom of the lens to the top of your bottom eyelid. Most people are fine with a standard segment height with a lined bifocal (FT-28 or FT-35); for standard segment height, you can leave the “Segment Height” field blank.
Look for the Bifocal FT-28 in the Lens Options field when ordering your bifocal glasses.
Available in these LENS MATERIALS:
• High Index
Available in these LENS TINTS:
• Transitions Gray and Brown
• Drivewear: Yellow to Dark Red Brown
• Polarized Gray and Brown
• Fixed Tints, such as Tan C, Pink, Green, Gray, Yellow, and more