In today's digital world, "anti blue light" glasses have surged in popularity. But with prices ranging from $15 to over $200, what determines the cost, and how do you choose the right pair? Understanding "Blue Ray" Protection Contrary to the common misspelling "blue ray," these glasses filter high-energy visible (HEV) blue light emitted from screens and LEDs. Quality lenses effectively reduce digital eye strain, improve sleep patterns, and enhance contrast.