Frequently Asked Questions

Choose Day lenses for daytime screen use and a lighter visible tint. Choose Evening lenses for artificial light and screen use after dark when you want the stronger orange filtering system.

The stronger tint changes the wavelengths that reach your eyes, so Evening lenses look visibly orange and also change color perception while you wear them.

See the Clip-On collection for options designed to attach to compatible prescription frames.

Open the NoBlue Test Results page to compare the published measurement summary and source information for the lens systems.

Compare the frame width, lens width, bridge and temple measurements shown on each product page with a pair of glasses that already fits you well.

Use a clean microfiber cloth. For a deeper clean, use lukewarm water and a lens-safe cleaner, then dry gently. Avoid abrasive materials.

NoBlue publishes current spectral transmission measurements for the Day and Evening / Orange systems. See the Test Results page for the current figures, source details and available reports.

Clinical research is mixed and depends on the lens, timing, population and outcome. A 2023 Cochrane review found that blue-light filtering spectacle lenses may not reduce short-term computer-related eye strain, while evidence for sleep outcomes was uncertain. NoBlue therefore separates measurable lens transmission from claims about individual health outcomes.