One type of glasses for myopia treatment is frame glasses; the other is keratoconus. Ordinary frame glasses are easy and practical, most people choose to wear frame glasses, the material mainly has two kinds of glass and resin. Glass lenses have high refractive index, good wear resistance, but easy to break; resin lenses are not easy to break, lightweight, anti-UV, but easy to wear. Now more often used is aspheric lenses, which are thinner and lighter, and can reduce aberrations. Soft lenses are easy to fit and comfortable to wear; hard lenses are mainly hard, high oxygen permeable corneal contact lenses, or RGP, which are more complicated to fit but have better imaging quality and can be used to correct astigmatism.