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Pinhole glasses are a type of corrective glasses that do not use a lens and are claimed to help correct the eye's refractive error without introducing the image distortion of traditional lens-based glasses. Pinhole glasses do not actually refract the light or change the focal length, they operate by reducing the size of the blur circles in the retinal images. In blurry vision, every point on the object corresponds with a blur circle in the image. By reducing the size of the blur circles, they reduce the overlap of the blur circles in the image, clarifying the vision somewhat.

Suitable for both adult or children who has the problem of myopia, hyperopia, and astigmatism.
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.
Wearing for 15 minutes one day will help to improve your eyesight within 2-4 weeks

Some advantages

Wearing for 15 minutes one day will help to improve your eyesight within weeks

Activates your natural vision ability to see clearly
Eliminates stress and strain caused by glasses
Helps you see clearly near and far
Promotes vision habits
Good and simple eye relaxation for a large population whose job causes tired eyes: students, teacher, white collar, computer users.. age from child to aged people, etc

Suitable crowd
Myopia (short sightedness)
Hyperopia (long sightedness)
Presbyopia (age-related reduced range of focus)
Astigmatism
Cataracts
Eye strain (from computer screens)  

NOTE: If you have more than 6 diopters of myopia, you will probably not find pinholes useful since they cannot overcome so much blur. And, due to the reduced peripheral vision of the lenses, pinhole glasses are intended to be used only when sitting or standing still. They should not be used when moving about or driving a vehicle.

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