Specification: Material: Plastic Color: Black Dimension: About 15 x 12 x 3cm Description: Activates your natural vision ability to see clearly. Special designed to improve eyesight, especially for eye focusing problems. Wearing for 15 minutes one day will help to improve your eyesight within 2-4 weeks. Adult or children who has the problem of myopia, astigmatism, and hyperopia are all suitable to wearing. Pinhole glasses are Helpful for the following Eye Problems: Myopia, Hyperopia ,Presbyopia, Astigmatism, Cataracts, Eye strain . Package Included: 1 X Pinholes Glasses