1000 Pieces/CTN Box, Size: 51 cm x 44 cm x 49 cm (L/W/H) Weight: 30 kg
1 day (Sample order), 3 days (Bulk order)
1.High quality glasses for blurred vision
2.Black pinhole glasses with plastic frame
3.Cheap pinhole glasses
Black Pinhole Glasses for Blurred Vision
Pinhole glasses (also known as stenopeic glasses from the Greek words for "little opening") are not made of glass at all but of an opaque substance such as metal or plastic. The user looks through any of the many small holes in the material. These holes have the effect of reducing the width of the bundle of diverging rays (called a "pencil of light") coming from each point on the viewed object. Normally, the full opening of the pupil admits light. It is the improper bending of the outermost rays in that pencil of light which causes refractive errors such as myopia, hyperopia (farsightedness), presbyopia (diminished focusing range with age) and astigmatism to be noticeable. Pinholes can bring about clearer vision in all these conditions. By blocking these peripheral rays, and only letting into the eye those rays which pass through the central portion of the pupil, any refractive error in the lens or cornea is not noticed as much. The pupil may be wide open, but only the central portion is receiving light. The improvement in visual acuity can be striking.
Look at this drawing of a myopic eye with a pinhole lens in front of it. You will see that the eye does not need to deal with the rays that would need the most bending since they are blocked by the lens.
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
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.