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A wide bifocal segment is a type of lens where the reading portion at the bottom is wider than the standard size. Most bifocals have a reading area that is 28mm wide, but a wide segment can be 35mm or even span the entire width of the lens. This gives the wearer a much larger area for close-up tasks like reading, sewing, or working on a computer.
read more about wide bifocal segment ...The D-35 is one of the most popular wide segments. It is shaped like a flat-top D and measures 35mm across. This extra width is perfect for people who find standard bifocals too narrow and hate having to move their head back and forth to read a full line of text across a page.
The Executive bifocal is the widest possible option. It features a line that goes all the way across the middle of the lens. The top half is for distance and the bottom half is entirely for reading. This provides a massive field of view for near work but makes the glasses heavier and the line much more visible.
Professionals like accountants, musicians, and draftsmen often prefer wide segments because they need to see wide spreadsheets, sheet music, or large blueprints without distortion. It allows for more natural eye movement and reduces the need for constant head turning during long work sessions.
Wide segments, especially the Executive style, can be heavier and thicker than standard bifocals. The visible line is also more prominent, which some people may find less attractive. However, for those who prioritize a large reading area, these trade-offs are usually worth the improved visual comfort.
No, wide segments require a frame with enough vertical depth to fit the large reading area. If the frame is too small, the best part of the reading zone will be cut off during the manufacturing process at the lab.
They are different. Progressives have no lines but have some blur on the sides. Wide bifocals have a line but offer a crystal-clear, wide area for reading with no side distortion. Many people find them easier for dedicated desk work.
The line is where the two different powers of the lens meet. In a wide segment, this line is longer than in a standard bifocal, which is necessary to provide the wider field of view you need for comfortable reading.
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