The main benefits of OK lenses, also known as keratoconus, are: controlling the progression of myopia and eliminating the need to wear lenses during the day. OK lenses are highly permeable rigid corneal contact lenses. Studies have shown that OK lenses can effectively control the progression of myopia, but the control rate is not 100%, which means that myopia may also increase with OK lenses, just more slowly. In addition, OK lenses are worn at night, the cornea is shaped during sleep, and OK lenses can be removed when you get up in the daytime, and generally, the naked eye vision can be kept normal during the daytime, which is also one of the advantages and benefits of OK lenses. However, whether it is suitable to wear keratoplasty lenses or not needs a series of examination in a regular eye medical institution to determine.