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1.56 Semi-Finished Photochromic Flat Top Lenses

1.56 semi-finished photochromic flat top lenses are light-adaptive bifocals that darken in sunlight and are clear indoors. They provide 100% UV protection. Made from 1.56 index resin, these lenses offer an affordable solution for those who need both distance and near vision correction. As semi-finished blanks, they require custom processing to fit individual prescriptions.

    Product Specification

    Material

    Resin

    Index

    1.56

    Vision Effect

    Flat-top bifocal & photochromic

    Base Curve

    2,4,6,8

    Abbe Value

    38

    Specific Gravity

    1.28

    Diameter

    70mm

    Transmission

    99%

    Coating Choice

    HC/HMC/SHMC

    Coating Color

    Blue coating & green coating

    Product Description

    Lenses with an index of 1.56 are considered to be the most cost-effective lenses on the market. They are 22% thinner than standard CR39 lenses.

    These lenses change their color based on UV light exposure. They provide 100% UV protection against harmful UVA and UVB rays. By automatically adjusting to light conditions, they help to minimize eye strain and discomfort in diverse environments.

    1.56 semi-finished lenses are the most common lenses in the RX lab and offer stable parameters for accurate RX production. They require further processing (a customization of the back curve and other parameters) to match a specific client’s prescription (RX). They can be cut to fit into the frames perfectly. 

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    A "D-Segment" bifocal design in the lower portion of the lens is for reading and other close-up tasks. When using bifocal, it is clear at near and far distances, but the intermediate distance (between approximately 2 and 6 feet) may be blurred. Take the example of a piano player. He can see far and near, but the notes he is trying to read are too far away. Therefore, he must use the center section in order to see the notes.

    Our Company

    Wishful optical maintain an extensive inventory of high-quality semi-finished lenses. Our dedicated RX labs provide expert, rapid processing to meet your specific prescription requirements. Whether you are a lens wholesaler, an eyewear brand owner or an optical laboratory, choosing our high-quality semi-finished lenses will help you better serve your customers and strengthen your market position. With close to two decades of reliable manufacturing experience, we are well-equipped to meet diverse requirements, ensuring quality products and timely delivery. 

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