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This is a pair of pinhole glasses that can be customized. Custom logo sunglasses are a universally appreciated logo gift that is unisex and appealing to all age groups. We can print your logo on the temples and lenses, which great for bars, music festivals and fashion campaigns. It is now widely accepted that pinhole glasses do improve vision for suffering with refractive error eye disorders, even ophthalmologists use pinhole equipment to check eyes for refractive disorder. Frequent substitute of prescription glasses (TV, computer and reading) with pinhole glasses will result in improved vision, which is natural and drug-free. Experience 10-20% vision improvement in 2-4 weeks. Theory is very simple: when the eyes can only look through the small holes, they naturally change focus to a relaxing standard, so that the eyeballs are relieved from the previous nervous focus. Pinholes improve the sharpness of the image, allowing your brain to find the point of focus. During this process of focusing, the muscles of the eyes are getting used more and this regular exercise helps your eyes focusing system.