The Vision Council, for instance, says that exposure to blue light is linked to "age-related macular degeneration (AMD) and cataracts" as well as "damage to the retina exposing the eye to hidden spikes in intensity."

In addition, blue light has long been linked to sleep issues, with experts counseling people to avoid looking at screens before going to bed.

It's hard enough to convince people to choose non-screen forms of recreation late at night, but the additional pressure that employees feel to stay connected to their employer makes it even harder to get people to disengage from their devices for even a half hour before bed.

Transitions Optical, a company that makes lenses that adjust based on the intensity of ultraviolet rays, is touting a survey it conducted of employees which finds millennials, in particular, are interested in protection against blue light.

Eighty-three percent of millennials, 77 percent of Gen Xers and 75 percent baby boomers believe that blue light protection is important in eyewear, finds the online survey of 1,002 employees with vision benefits.

About a quarter of millennials say they don't know whether the glasses they currently wear provide that type of protection. Among baby boomers, 37 percent don't know.

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"We have people of all ages saying harmful blue light protection is important to them, but aren't necessarily taking action. They aren't talking to, or hearing from, their doctors, and many don't have — or don't know whether they have — protection in their lenses," says Drew Smith, who heads the company's North America operations, in a statement accompanying the study's release.

If medical concerns about blue light become greater, one can expect more pressure on employers to alter their vision benefits to account for eyewear aimed at addressing the issue.