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Product Show
Product Description
Index | Monomer | Abbe value | Specific Gravity |
1.59 | Polycarbonate | 32 | 1.20 |
Transmission | Coat | Guarantee years | Place of origin |
97% | HMC | 3~5 years | China |
Diamater/Round top segment(mm) | Power range | ||
70/28 | SPH: 0.00~+3.00 ADD: +0.75~+3.50 | ||
Product Features
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A flat top 28 bifocal lens is 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. |
Polycarbonate
1. Impact Resistant
Polycarbonate material was originally made for uses on canopies covering fighter planes and then made its way into space on astronaut visors and space shuttle windshields. Today it is readily available to the public. It impact resistance makes the material extremely suitable for sports, industrial safety goggles, and children's eyewear.
2. Scratching
The reason for polycarbonate lenses' impact resistance is because of its "softness". Softer materials will flex instead of fragment when met with great force. However, the property allows lenses to be scratched easily. Therefore, every single one of our polycarbonate lenses is multi-coated with hard coating that forms a protective layer around the lenses allowing the lenses to be free from scratches while retaining its impact resistant qualities. |  |
3. UV Protection
Polycarbonate lenses inherently carries UV protection properties that blocks nearly 100% of the UV rays from entering the back of the retina.
Coating Choice
Hard Coating/ Anti-scratch Coating | Anti-reflective Coating/ Hard Multi Coated | Crazil Coating/ Super Hydrophobic Coating |
| Avoid ruining your lenses quickly---protect them from getting scratched easily | Reduce glare by eliminating the reflection from the surface of the lens--not to be confused with polarized | Make the surface of the lenses super hydrophobic, smudge resistance, anti static, anti scratch, reflection and oil |
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