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| Quantity: | |
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Technical Data
| Production | Monomer | Diameter | Coating Choice |
| 1.56 semi finished single vision lens | NK55, imported from Japan | 70/75mm | hard coated |
| Abbe value | Specific Gravity | Transmission | Guarantee years |
| 43 | 1.16 | >97% | 5 years |
| Power range | |||
| Base: 50~1000 | |||
Features
 | 1) What's the importance of a good semi-finished lens to RX production?
a. High qualified rate in power accuracy and stability
Not just superficial quality, semi-finished lenses are more focus on the internal quality, such as precise and stable parameters, especially for the popular freeform lens.
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2) What is the semi finished lens?
Lenses with different dioptric powers can be made from one semi-finished lens. The curvature of the front and back surfaces indicates whether the lens will have a plus or minus power.
Semi-finished lens is the raw blank used to produce the most individualized RX lens according to the patient's prescription. Different prescription powers request for different semi-finished lens types or base curves. |
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Index 1.56:
1.56 middle index lenses are one of the most popular lenses all over the world. This determines that Aogang 1.56 single vision lenses have the most outstanding optical features:
1. Thickness: In the same diopters, 1.56 lenses will be thinner than CR39 1.499 lenses. As the increase in diopters , the difference will be bigger.
2. Visual Effect: Compared with high index lenses, 1.56 lenses have higher ABBE value, can provide the more comfortable visual experience.
3. Coating: The uncoated lenses are easily subjicted and exposed to scratches, hard coating lenses can effectly scratch resistance.
Lenses with a 1.56 index are considered the most cost effective lens on the market. They possess 100% UV protection and are 22% thinner than CR-39 lenses. They are available with aspheric technology and are not recommended for a rimless drill mount due to its weak nature.
Coating
 | Hard Coating is also named anti-scratch coating, can protect uncoated lenses from impact and scratch resistance. |
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