1.49/1.56 Bifocal Flat-Top Lenses
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What are Flat-Top Bifocal Lenses?
Flat-top bifocals are a type of multifocal eyeglass lens designed to correct two different vision problems in one lens. They are also called "D-segment" or "straight-top" bifocals.
This bifocal lens is divided into two primary zones: Distance Zone (Top Portion) and Near Zone (D-Shaped Segment).
Unlike round-segment bifocals, the near-vision area in a flat-top design is a D-shaped segment with its flat edge on top.
This flat-top segment is fused into the main lens. To use it, you simply lower your eyes to look through the bottom part of the glasses.
Contact usWider Reading Area
The D-shape provides a broader horizontal field of view for near vision compared to round-top.
This makes reading books or viewing computer monitors more comfortable.
Users can scan lines of text without moving their head as much.
Less "Image Jump"
"Image Jump" is the sudden displacement of an object's image when your gaze moves across the dividing line into the powerful reading segment.
Because the optical center of the flat-top segment is located very close to its top edge, this disruptive jump effect would be minimized compared to round-segment bifocals.
Affordability
H&C Optik Flat-Top Bifocals provide a cost-effective solution by utilizing a simpler two-zone design.
Our Flat-Top is less complex and more affordable than no-line progressive lenses.
H&C Optik Bifocal Lenses Catalog
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| Index | Design | Diameter | Sph（+） | ADD | CYL（+） | Sph（-） | ADD | CYL（-） |
| 1.499 | Round-Top Bifocal | 65-28 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
| 1.499 | Flat-Top Bifocal (L/R) | 70-28 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
| 1.56 | Round-Top Bifocal | 70-28 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
| 1.56 | Round-Top Bifocal | 65-28 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
| 1.56 | Round-Top Bifocal | 70-24 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
| 1.56 | Flat-Top Bifocal (L/R) | 70-28 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
| 1.56 | Invisible Round-Top Bifocal (Blended) | 70-28 | +0.25~+3.00 | 1.00~3.00 | 0.00~-2.00 | 1.00~3.00 | ||
Bifocal Options We Offer: | ||||||||
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