These glasses are specially designed to improve vision, especially the focus of the eyes. Suitable for adults or children with nearsightedness, farsightedness and astigmatism. Help relieve fatigue and prevent myopia. Wear it for 15 minutes a day Helps exercise eye muscles and relax eyes And can activate your natural vision to make it clearly visible. Advantages of glasses: nearsightedness (nearsightedness), farsightedness (farsightedness), presbyopia (related to narrowing the age range), astigmatism Specification: Product Type: Glasses, Colour: Black, Quantity:2X glasses.