CR39 Sunglasses lenses
Production Details
| Place of Origin: | Jiangsu | Brand Name: | BORIS |
| Model Number: | High Index Lens | Lenses Material: | resin |
| Vision Effect: | Single Vision | Coating Film: | UC/HC/HMC |
| Lenses Color: | colorful | Coating Color: | Green/Blue |
| Index: | 1.49 | Specific Gravity: | 1.32 |
| Certification: | CE/ISO9001 | Abbe Value: | 58 |
| Diameter: | 80/75/73/70mm | Design: | Asperical |
Usually, sunglasses have the following materials:
1. Resin lens Lens material: Resin is a chemical substance with a phenolic structure. Features: light weight, high temperature resistance, strong impact resistance, and can effectively block ultraviolet rays.
2. Nylon lens Lens material: made of nylon, features: very high elasticity, excellent optical quality, strong impact resistance, usually used as protective items.
3. Carbonated polyester lens (PC lens) lens material: strong, not easy to break, impact resistant, specially designated lens material for sports glasses, the price is higher than that of acrylic lenses.
4. Acrylic lens (AC lens) lens material: It has excellent toughness, light weight, high perspective and good anti-fog.
Production Introduction
Ophthalmologists recommend that you must always wear sunglasses to protect your eyes; this is because our eyeball (lens) is very easy to absorb ultraviolet rays, and the damage of ultraviolet rays has two prominent characteristics:
1.The damage of ultraviolet rays will accumulate. Since ultraviolet light is invisible light, it is difficult for people to perceive it intuitively.
2.The damage of ultraviolet rays to the eyes is irreversible, that is, irreparable. Such as: cataract surgery can only be replaced by intraocular lenses. Long-term damage to the eye can easily lead to damage to the cornea and retina, clouding of the lens until cataract occurs, resulting in permanent visual damage.
Since the damage of ultraviolet rays to the eyes is invisible, it cannot be felt immediately. If you don’t wear glasses, you don’t feel particularly uncomfortable. It just means that your eyes are not very sensitive to visible light (such as dazzling glare, glare, and reflected light). , and cannot avoid UV damage.
Does the darker the sunglasses, the better the UV blocking effect?
No, the function of the lens to block ultraviolet rays is that it is treated by a special process (adding UV powder) during the manufacturing process, so that the lens can absorb harmful light below 400NM such as ultraviolet rays when the light penetrates. It has nothing to do with the depth of the film.
Product Process
