Autumn Sale: 2 FOR 1 FREE + 25% Off Any Lens Upgrades | Code: BOGO25

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S05022

AUD$59.00

43 Reviews

S65308

AUD$59.00

201 Reviews

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FASM1771

AUD$44.00AUD$59.00

33 Reviews

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DT17660

AUD$44.00AUD$59.00

47 Reviews

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MT04352

AUD$44.00AUD$59.00

34 Reviews

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LT8831

AUD$44.00AUD$59.00

51 Reviews

S18293

AUD$67.00

29 Reviews

S43054

AUD$59.00

9 Reviews

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ST0121

AUD$44.00AUD$59.00

30 Reviews

LT9913

AUD$59.00

24 Reviews

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S75761

AUD$44.00AUD$59.00

4 Reviews

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AUD$59.00

2 Reviews

Vicky21120

AUD$59.00

4 Reviews

S31915

AUD$59.00

1 Reviews

S70560

AUD$59.00

5 Reviews

ShirleyT20306

AUD$59.00

27 Reviews

S23850

AUD$59.00

17 Reviews

S38414

AUD$59.00

64 Reviews

T23116

AUD$75.00

1 Reviews

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S18588

AUD$44.00AUD$59.00

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S25392

AUD$70.00

3 Reviews

OBMT2007

AUD$59.00

85 Reviews

S20344

AUD$75.00

4 Reviews

S55712

AUD$59.00

40 Reviews

S73222

AUD$59.00

2 Reviews

S01270

AUD$59.00

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S45627

AUD$59.00

2 Reviews

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S66107

AUD$44.00AUD$59.00

1 Reviews

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S58306

AUD$44.00AUD$59.00

78 Reviews

S27263

AUD$59.00

0 Reviews

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S17253

AUD$44.00AUD$59.00

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ST945

AUD$59.00

17 Reviews

DT62343

AUD$59.00

19 Reviews

ST3500

AUD$59.00

36 Reviews

ST985

AUD$59.00

74 Reviews

S92940

AUD$59.00

1 Reviews

S70385

AUD$59.00

1 Reviews

S53374

AUD$59.00

36 Reviews

S29016

AUD$59.00

1 Reviews

ST0125

AUD$59.00

29 Reviews

S85235

AUD$59.00

0 Reviews

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SandyT21110

AUD$44.00AUD$59.00

21 Reviews

ST0178

AUD$59.00

27 Reviews

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S86449

AUD$44.00AUD$59.00

11 Reviews

S88389

AUD$59.00

5 Reviews

SMLT065

AUD$59.00

68 Reviews

ST11071

AUD$59.00

14 Reviews

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S33626

AUD$44.00AUD$59.00

3 Reviews

S80673

AUD$59.00

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Judy163

AUD$59.00

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AUD$59.00

1 Reviews

JudyT118

AUD$59.00

30 Reviews

S02089

AUD$59.00

55 Reviews

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AndrewT027

AUD$44.00AUD$59.00

4 Reviews

S33776

AUD$59.00

121 Reviews

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S10560

AUD$44.00AUD$59.00

15 Reviews

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JudyT20307

AUD$44.00AUD$59.00

34 Reviews

S85915

AUD$59.00

18 Reviews

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About
Photochromic sunglasses are equipped with photochromic lenses, which darken substantially in response to UV light in less than one minute and then continue to darken very slightly over the next fifteen minutes. The lenses will begin to clear as soon as they are away from UV light, and will be noticeably lighter within two minutes and mostly clear within five minutes. However, it normally takes more than fifteen minutes for the lenses to completely fade to their non-exposed state. The best quality photochromic lenses can offer very quick transition times.

Sunglasses or prescription eyeglasses that darken when exposed to the sun were first developed by Corning in the late 1960s and popularized by Transitions in the 1990s. In fact, because of the extreme popularity of the Transitions brand, these lenses are usually referred to as transition lenses. The correct term for these glasses is photochromic or photochromatic, which refers to a specific chemical reaction the lenses have to ultraviolet (UV) radiation.

Photochromic lenses have millions of molecules of substances such as silver chloride or silver halide embedded in them. The molecules are transparent to visible light in the absence of UV light, which is normal for artificial lighting. But when exposed to UV rays, as in direct sunlight, the molecules undergo a chemical process that causes them to change shape. The new molecular structure absorbs portions of the visible light, causing the lenses to darken. The number of molecules that change shape varies with the intensity of the UV rays. When you go indoors and out of the UV light, a different chemical reaction takes place. The absence of the UV radiation causes the molecules to snap back to their original shape, resulting in the loss of their light absorbing properties. In both directions, the entire process happens very rapidly. An important note about photochromic lenses: because they react to UV light and not to visible light, there are circumstances under which the darkening will not occur. A perfect example of this is in your car. Because the windshield blocks out most UV light, photochromic lenses will not darken. For this reason, most sunglasses with photochromic lenses also have a certain amount of tint already applied to them.
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