Product Description Lens material: PC Frame material: metal Size: width 143mm, temple length 141mm, nose bridge 17mm Colour: Black Quantity: 1 piece Package content: 1 piece * eyeglasses 1. Improved vision: The raster glasses usually only show the first positive effects after about a week of daily approx. 2. Training eye muscles: The glasses are often used for individual, naturopathic eye training / eye gymnastics. It can be used during training, but also in everyday life when reading, working on the computer or while walking in the forest. 3. Principle: By changing the light rays falling in the eye, the image on the retina in the eye can be optimized in a point-like manner. The subjective impression is a sharper picture. 4. Versatile use: The grid glasses are suitable for the near and far range and can be used for refractive ametropia such as nearsightedness, farsightedness, astigmatism or presbyopia. In summer they can also be used as sun glasses.