Function: | for Presbyopic, for Astigmia, UV Protection, for Myopia |
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Material: | Nk55, Imported From Japan |
Abbe Value: | 42 |
Specific Gravity: | 1.15 |
Coating Choice: | Hmc/Shmc |
Power Range: | Sph:000~ +300 000~-200 Add:+100~+300 |
Samples: |
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Customization: |
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Suppliers with verified business licenses
Product Name
|
1.56 Photogrey Round Top Bifocal HMC Lens
|
Diameter
|
70mm
|
Monomer
|
NK55 (Imported From Japan)
|
Abbe value
|
42
|
Specific Gravity
|
1.15
|
Power Range | Sph:000~ +300 000~-200 Add:+100~+300 |
The molecules responsible for causing photochromic lenses to darken are activated by the sun's ultraviolet radiation. Because UV rays penetrate clouds, photochromic lenses will darken on overcast days as well as sunny days.
Photochromic lenses typically will not darken inside a vehicle because the windshield glass blocks most UV rays. Recent advancements in technology allow some photochromic lenses to activate with both UV and visible light, providing some darkening behind the windshield.
1. Are your company a manufacturer or a trade company?Suppliers with verified business licenses