Why you don't need blue light lenses: Hidden camera investigation (Marketplace)

Many of us are feeling the strain on our eyes from staring at our smartphones and computer screens all day. But some of Canada's largest optical chains are selling you a solution experts say you don't need: lenses that protect our eyes from the blue light emitted from our devices. Leading experts tell Marketplace some of Canada's top chains seem to be using "misleading" claims to sell the lenses. And an opthalmologist reveals some easy and free tips that will ease digital eye strain.

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