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It is now widely believed that small hole glasses can actually improve vision, avoid visual impairment, and even ophthalmologists use small hole devices to check for ametropia.Pin-hole Glasses to help promotes good vision habits. Help exercise eye muscles and relax your eyes. Activate your natural vision ability to see clearly.Suitable for both adult or children who has the problem of myopia, hyperopia and astigmatism. Lightweight and Portable, Stylish design, Comfortable and Safe to wear.Wearing 15 minutes a day will help improve your vision. Activate your natural vision ability in a few weeks. Clearly eliminate stress, strain-induced glasses can help you clearly see the distance and promote visual habits.Package include: 1 PC * Pinhole Glasses