These glasses use a progressive multi-zone lens design. Different areas of the lens are intended for different viewing distances, so you move your gaze through the lens to find the clearest zone for the task in front of you.

No batteries or electronics are required. The design relies on a progressive lens layout rather than a powered focusing system.

There can be. If you're new to progressive lenses, your eyes may need some time to become accustomed to using different areas of the lens. Begin in familiar surroundings and allow yourself time to adapt.

If you already use over-the-counter reading glasses comfortably, start with the same reading strength. If you're uncertain about your vision requirements, an eye-care professional can provide appropriate guidance.

They are designed for everyday close and intermediate viewing, which may include phones, tablets and computer tasks depending on your chosen magnification and individual vision needs.

These glasses should not be considered a replacement for individually prescribed corrective lenses. If you have astigmatism, significant distance-vision problems, different prescriptions in each eye or an eye condition, speak with an eye-care professional.

Do not rely on non-prescription reading glasses for driving unless they are appropriate for your vision and permitted under applicable local requirements. Clear distance vision is essential for driving safety.