Customization: | Available |
---|---|
Function: | for Presbyopic, for Astigmia, UV Protection, for Myopia |
Material: | Nk55, Imported From Japan |
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Product Name
|
1.56 Photochromic Lens
|
Diameter
|
65/70mm
|
Monomer
|
NK55 (imported from Japan)
|
Abbe value
|
42
|
Specific Gravity
|
1.15
|
Power Range | SPH: -20.00~+11.00 CYL: 0.00~-6.00 |
Photochromic lenses are available in nearly all lens materials and designs, including high indexes , bifocal and progressive. An added benefit of photochromic lenses is that they shield your eyes from 100 percent of the sun's harmful UVA and UVB rays.
Because a person's lifetime exposure to sunlight and UV radiation has been associated with cataracts later in life, it's a good idea to consider photochromic lenses for children's eyewear as well as for eyeglasses for adults.
Other products:
MR-8 | MR-7 | MR-174 | Polycarbonate(PC) | NK-55 | CR-39 | |
Refractive Index |
1.61 | 1.67 | 1.74 | 1.59 | 1.56 | 1.499/1.50 |
Abbe Number (ve) |
41 | 32 | 33 | 32 | 37.5 | 58 |
SPECIFIC GRAVITY |
1.30 | 1.35 | 1.47 | 1.20 | 1.28 | 1.32 |
Diameter | 65/70/75 | 65/70/75 | 65/70/75 | 65/70/75 | 55/60/65/72 | 55/60/65/70 |
Impact Resistance |
Good | Good | OK | Good | OK | OK |
Static Load Resistance |
Good | Good | OK | Good | Poor | Good |