Living with the blues

Transitions Optical has released results from recent tests conducted on the effectiveness of its photochromic lenses against blue light.

The company found that when its Signature VII lens was used indoors 20% of blue light was prevented from reaching the eye. This was two times more than standard clear lenses. When used outdoors the lens was found by the company to block 85% of the blue light wavelengths that usually confront the eye.

Meanwhile, the XTRActive lenses were found to block 34% of the blue light wavelengths indoors and 88% when worn outdoors.

Transitions Optical stated: ‘This feature isn’t new to this company’s products. Transitions lenses have always blocked a percentage of blue light indoors because the photochromic molecules in the un-activated indoor state still absorb some light without compromising indoor vision clarity. Because we can control the structure of the photochromic molecules, we can, in turn, provide the benefit of blue light blocking while the lenses are still seen as clear.’