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Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens
Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens
Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens
Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens
Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens
Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens

Grey Brown Photochromic Prescription CR-39 Resin Aspheric Lens

Regular price
€37,95
Sale price
€37,95
Shipping calculated at checkout.

How to choose lens index

Lens index reflects lens thickness, there is 1.56, 1.61, 1.67 index etc.

The higher lens index is, the thinner lens is. 1.67 is thinner than 1.61 than 1.56 at the same degree.

Lens thickness also depends on frame size. The bigger frame is, the thicker lens is.

 

1.56 index suggestion degree:

SPH: -0.00 ~ -4.00;CYL: -0.50~-2.00

SPH: +0.50~+4.00;CYL:+0.50~+2.00

 

1.61 index suggestion degree:

SPH: -0.00 ~ -6.00;CYL: -0.50~-2.00 

SPH: +4.00~+6.00;CYL:+0.50~+2.00

 

1.67 index suggestion degree:

SPH: -3.00 ~ -8.00;CYL: -0.50~-2.00 

SPH: +4.00~+8.00;CYL:+0.50~+2.00 

 

If your Cylinder2.00, you need to pay extra 10usd for high astigmatism customization.   ($10 link here)

 

If you have any question, please contact with us   ( service@cinily.net )

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