Schwarze Lochbrille für Augentraining und Entspannung.

Four pairs of black sports pinhole glasses to improve vision: Pinhole glasses typically begin to show positive effects after about half an hour of daily wear (ideally while reading) for a week. Regularly changing pinhole glasses (using lenses with small holes) can naturally improve vision without medication. Eye muscle training: These glasses are often used for personal natural eye exercises/training. They can be worn not only during training but also in daily life, such as while reading, using a computer, or walking in the woods. Principle: By altering the light entering the eye, the image on the retina is optimized. The subjective feeling is a clearer image. Versatile uses: Pinhole glasses are suitable for both nearsightedness and farsightedness, and can be used to correct refractive errors such as myopia, hyperopia, astigmatism, or presbyopia. In summer, they can also be used as sunglasses.