Universal glasses Pinhole eyeglasses Relieve eye fatigue correct vision glasses Vision Care Pin Eye Small hole Eyeglasses Lens material: resin Frame material: plastic Visible light transmittance: 99.9 (%) Color: black Weight: about 23g Applicable to:Unisex（free size） Pinhole glasses look like sunglasses but instead of lenses they have a sheet of thin perforated plastic. These tiny holes each allow a very thin beam of light into the eye, which eliminates the scattering of the light and reduces the confusion (or blur) on the retina Lightweight mirror legs designed according to the structural characteristics of human ears; more suitable for human head; shared the pressure of ear support; comfortable to wear Pinhole glasses can help a wide range of eye problems: Myopia (short sightedness) Hyperopia (long sightedness) Presbyopia (age-related reduced range of focus) Eye strain (from computer screens) Pinhole glasses should be worn for around 15 minutes a day ndash the act of looking through the tiny holes will exercise the eyes and after just a couple of weeks, You will find different， Scientifically designed pinholes, filter abnormal light, correct light source into the eye, relax eye muscles, reduce eye fatigue and tension, improve vision Please note that pinhole glasses limit peripheral vision and therefore restrict the field of view so they should not be worn for activities such as driving. Package include: 1 pcs X pinhole glasses