Contact lenses can be worn for 800 degrees of myopia, but it is important to note that the contact lens prescription is lower than the corrected vision prescription. Myopia is usually corrected by wearing frames. Framed spectacles lenses and contact lenses and cornea distance is different: framed spectacles lenses at a certain distance from the cornea for the concave lens, the outside world through the concave lens has a certain dispersion; contact lenses directly affixed to the surface of the cornea, there is no 12mm or so light dispersion, so contact lenses should be lower than framed spectacles glasses. When myopia reaches 800 degrees, contact lenses usually need to be 75 degrees lower than the frame lens, that is, wearing 725 degrees of contact lenses to achieve the effect of 800 degrees wearing frame glasses. If you have 800 degrees of myopia, it is recommended that you wear appropriate contact lenses under the guidance of your doctor, and pay attention to hand hygiene as well as contact lens cleaning to avoid infections.