Refractive indexdetermines how much light is bentwhen entering a material. It directly influences thickness of optical lens, the bigger, the thinner.
Abbe valueis a measure of the material's dispersionin relation to the refractive index, high values indicating low dispersion.
1.499 Single Vision Lens
Material: CR-39
Abbe value:58
Transmission: Over 93%
Specific Gravity: 1.32
Available: Non-coating, hard-coating, multi-coating
I. 1.499 SVSemi-finished Lens | |
i. Diameter(mm):65, 70, 75, 80, 85 | |
ii. Base: 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1,000 | |
I. 1.499 SVFinished Lens | |
i. Diameter(mm):60, 65, 70, 75, 80, 85 | |
ii. PlusPower Range: 0.00~+6.00/0.00~-6.00, | |
iii. Minus Power Range: 0.00~-8.00/0.00~-6.00 |
1.499 Bifocal Lens
Material: NK-55
Abbe value: 35
Transmission: Over 96.5%
Specific Gravity: 1.28
Diameter: 65/28mm (F), 70/28mm (SF)
Available: Flat Top, Round Top, Blended Top
Non-coating, hard-coating, multi-coating
1.499 Bifocal Finished Lens | |||
Power range | 0.00~-200 | 0.00~+300 | Add available: 1.00~3.50 |
Flat Top | √ | √ | |
Round Top | √ | √ | |
Blended Top | √ | √ |
1.499 Bifocal Semi-finished Lens | ||||||||||
Base | 50 | 200 | 400 | 600 | 700 | 800 | 1000 | 1200 | 1400 | Add available: 1.00~3.50 |
Flat Top | √ | √ | √ | √ | √ | √ | √ | √ | √ | |
Round Top | √ | √ | √ | √ | ||||||
Blended Top | √ | √ | √ | √ |
1.499 Progressive Lens
Semi-finished: Preview , Short (12+2), Long, Short (14+2)
Finished: Long, Short (14+2)
Finished Power Availability:-2.00 ~+3.00 Add+1.00 ~+3.50.
Short corridor
Low distortion
Maximum Astigmatism
Preview | Short(12+2) | Long | Short(14+2) |
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l Diameter:75mm | l Diameter:75mm | l Diameter:75mm | l Diameter:75mm |
l Width of Addition Area:18mm | l Short corridor (14mm to full addition power) l Individual designs for left and right eyes |
1.499 Semi-finished Progressive Lens | ||||||
Corridor | Fitting Cross (up from center) | Distance Circle （up from center） | Near Area Circle （down the center） | Minimum fitting height | Base Curves | Addition Powers (in 0.25D steps) |
Preview | +4.0mm | +10.0mm | 9.0mm | 14mm | 150, 350, 575, 775 | 1.00 ~3.25 |
Long | +2.0mm | +8.0mm | 17.0mm & 80 degree & to the lens side | 20mm | 200,400, 600,800, | 1.00~3.50 |
Short(12+2) | +2.0mm | +8.0mm | 12.0mm | 15mm | 150, 350, 575, 775 | 1.00 ~3.00 |
Short(14+2) | +2.0mm | +8.0mm | 14.0mm | 17mm | 200,400, 600,800, | 1.00~3.50 |