1.67 Semi-Finished Single Vision Lens
Product Specification
Material |
MR-7 |
Index |
1.67 |
Vision Effect |
Single vision |
Surface Design |
ASP |
Abbe Value |
32 |
Specific Gravity |
1.35 |
Diameter |
75mm 70mm |
Transmission |
99% |
Coating Choice |
HC/HMC/SHMC |
Coating Color |
Green |
Product Description
In the manufacture of optical lenses, there are several stages involved in the production of high-quality vision correction lenses. Among them, semi-finished lenses are important intermediate products before making the final customized lenses.
Semi-finished lenses are partially processed lens blanks that usually have a pre-shaped front surface with a specific base curve and optical properties. While their back surface remains unprocessed. It can be further surfaced, polished and coated to create a finished lens that fits a particular user's prescription.
The diopter of semi-finished lenses helps to improve vision. They are designed to correct specific vision problems such as myopia, hyperopia, astigmatism and presbyopia. According to the prescription, manufacturers will process the lenses into the required shape and size.
Product Advantages
◎ Material Selection: The semi-finished lenses are available in a variety of materials including resin, polycarbonate and glass. Each material has different optical properties, weight, and impact resistance.
◎ Additional Coatings: Semi-finished lenses can be combined with various coatings such as anti-reflective and scratch-resistant to improve their performance and durability. They are also available with blue light blocking and photochromic treatments.
◎ High Customizability: The primary advantage of semi-finished lenses is the ability to customize the unprocessed side to meet diverse optical requirements such as: high myopia/hyperopia correction, astigmatism correction and prismatic adjustments, progressive multifocal lens configurations, specific base curve matching.
◎ Thinner & Lighter: The main advantage of 1.67 high refractive index lenses is that they bend light more efficiently. This means that lenses of the same power can be made thinner compared to lenses with a lower refractive index, such as 1.56 or 1.61. This is especially beneficial for people with higher prescriptions, as it can reduce the thickness of the lenses. At the same time, 1.67 high-index lenses require less material, making them lighter than traditional lenses. This increases the comfort of wearing, especially for people who wear glasses for long periods of time.