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 Ships in 7 business days. It is shipped from China. Delivery is provided by China Post Air Mail. Delivery time depends on the couriers, local customs in your country also holidays, weather conditions. Usually it takes from 39 to 60 days, depending on the customs at your country.