Decentered / Round Lens 

Transparency

European Standard

Color

Usage

100~80%

0

Transparent or bright

Suitable for indoor and cloudy

43~79%

1

Light color

Suitable for a slight of sunlight

19~42%

2

Dark grey

Commonly used

8~18%

3

Dark

Strong sunlight

3~7%

4

highly dark

Suitable for intense sunlight
(snow, sand, tropical areas, etc.)
Not suitable for driving

6C Round

Available Dim(mm)

78*1.8mm( Finished Thickness1.8~2.0mm )

78*2.0mm( Finished Thickness2.0~2.2mm )

8C  Round

Available Dim(mm)

75*1.8mm( Finished Thickness1.8~2.0mm )

75*2.0mm( Finished Thickness2.0~2.2mm )

8C  Decentered

Available Dim(mm)

95*65*2.0mm(Finished Thickness2.0~2.2mm)

90*65*2.0mm(Finished Thickness2.0~2.2mm)

90*65*1.8mm(Finished Thickness約1.8~2.0mm)

Clear to deep grey : Transmittance 84%~25% Cat.0-2

Photochromic lens with no base color is very close to transparent when photochromic layer is not activated. The color turn grey gradully as sunlight is increased, so this type of lens is ideal for all environment and outdoor sports, you can experience the nature and comfort of indoor without changing lenses.

Light grey to deep grey : Transmittance 55%~17% Cat.1-3

Grey color based photochromic lens protects your eye at all times, the color become darker as sunlight is increased.
These type of lens works best outdoor environment and prolonged outdoor sports.

Light brown to light grey: Transmittance 86%~22% Cat.0-2

Brown photochromic lens can filter out some of the blue light, increase clarify and contrast. The transparency will adjust according to sunlight.
Its' ideal for early risers and sports such as hiking and golf.

Light brown to deep grey  : Transmittance 82%~22% Cat.0-2

Brown color based photochromic lens can filter out some of the blue light, increase clarify and contrast. 

Transparency level will adjust according to sunlight.
Its' ideal for prolonged outdoor usage and sports such as baseball.

Light brown to deep brown : Transmittance 61%~17% Cat.1-3

Brown color based photochromic lens can filter out some of the blue light, increase clarify and contrast. 
This type of lens filters similar wavelength as green lens does, but at a wider range.
Dark brown photochromic lens gives you the seasoned and sophisticated appreances.

Yellow to grey: Transmittance 78%~17% Cat.1-3

Yellow color based lens is ideal to be weared at night or driving. Yellow is on the opposite side of blue in color spectrum, so it absorbs the most of harmful blue light.

Yellow to grey: Transmittance 78%~17% Cat.1-3

Orange lens can block the blue light penetration from, providing clearer view and sharper contrast, makes the wearer most aware of the road condition.
Ideal for driving, jogging, cycling or any kind of sports on the road.

Orange to grey : Transmittance 57%~17% Cat.1-3

Pink lens reduce blue light penetration, raise color contrast and distance perception, this reduces eye fatigue, make skiiing and riding more comfortable.

Please avoid storing lenses above room temperature：
Storing lenses under high temperature will reduce shelf-life, and greatly deteriorate photochromic lenses, lenses could suffer from poor performance and aging. Lenses will peel  in the worst scenario. 
Recommended: Storing lenses in a constant  temperature of 20 - 20 ℃ and avoid UV light (artificial or sunlight) to extend shelf-life.
Example: In car and shelf exposed to direct sunlight (UV exposure)

Please avoid storing lenses under high humidity：
For normal anti-fog lenses: Storing these lenses under high humidity environemnt will deplete anti-fog coating's performance. Rinse and cleaning with water or any kind of chemical solution should also be avoided.
For washable anti-fog lenses: Storing these lenses under high humidity environemnt will deplete anti-fog coating's performance. Please avoid cleaning the lenses with any kind of chemical solution
Storing under 55% humidty level and cleaning with dry cloth can help to increase shelf-life.

Pleae avoid strong chemical solution：
Ophthalmic lenses are delicate, any kind corrosive chemical solution may cause permanet damage.
Alcohol pr mild cleaning agent is recommended. Room / solution temperature should be kept below 40℃, or the lens could be damaged.
The above does not apply to photochromic and anti-fog lens.
** photochromic and anti-fog lens should be cleaned using dry cloth only**

Becareful during fitting and grinding：
Photochromic lenses are softer than normal lenses, too much clampping pressure during fitting or grinding could result in dent or depressed surface. 
Soft padding is recommended to reduce clampping pressure.