Manufacturing Materials and Ingredients:The frame consists of 2 pairs of impact resistant polycarbonate lenses that combine to achieve a different prescription for each of your eyes independently at any time.Function:So each eye can achieve a different prescription, which can be changed by simply turning a knob. They also have an Ultra Block Filter that neutralizes the harmful blue tint from electronic device screens. Improves contrast in artificial light environments to help eyes focus easily and reduce fatigue.Benefits of Highlights:- Self-grading, multi-user, immediate vision correction- No eye exam required.- No tools required to adjust them.- They are used to see farsightedness (nearsightedness or farsightedness) and nearsightedness (presbyopia).- Light- Resistant- flexible Impact resistanceGraduation range from -6.00 to +3.00 You can save because they are 3 in 1 lenses because you can adjust to see close, medium and long distances.Usage:where can you use it? Under any condition. Just cover one eye and turn the knob on the other eye. Repeat for the other eye. They adjust in seconds like binoculars.Care:It is recommended to clean with cotton cloth and water, do not use soap.Contraindications:Not recommended for patients with astigmatism.We have it in stock for immediate shipment. We look forward to your purchase!combinación:solo gafasSin estuche para gafas