If an adolescent child’s myopia deepens rapidly, especially the astigmatism increases, parents will most likely think that the child will not develop high myopia, and think that letting the child use the eyes less and look at the computer less is the way to control the deepening. There is also a more terrible eye disease, in the early stage is the rapid increase in myopia and astigmatism, this disease is the cone cornea. It is an eye disease that manifests as a limited cone-like protrusion of the cornea, with thinning of the corneal stroma in the protrusion area. It often results in highly irregular myopic astigmatism and varying degrees of visual impairment, without inflammation. It usually develops sequentially in both eyes around puberty, with progressive loss of vision. Initially, it can be corrected with myopic lenses, but later contact lenses are required to enhance vision due to irregular astigmatism. It may be related to hereditary developmental abnormalities. Recently, cases of cone corneas after laser myopia correction have also been reported. Therefore, adolescents who present with progressive myopia deepening and high astigmatism should be alert to cone corneas. As the disease progresses, frame glasses become less effective in correcting vision. When cone cornea is usually clinically suspected, corneal topography should be performed to determine its similarity to cone cornea. Early detection and confirmation of the diagnosis of cone keratoconus is very important. The disease can be treated with rigid corneal contact lenses and implantation of corneal stromal rings in the early and middle stages, with good visual results after treatment. Ophthalmologists believe that corneal stromal ring implantation is currently the most ideal treatment option for cone keratoconus disease. It is a reversible cone keratoplasty procedure that allows the implanted ring to be removed in a very simple way when there are changes in the patient’s cornea or when it is medically necessary, and the corneal recovery is very good, leaving almost no trace of damage. There is no rejection of the implanted ring, this minimally invasive procedure does not damage the patient’s cornea, and further development of the cone can be controlled after implantation. The procedure is simple and less painful. If the cone develops to an advanced stage, the top of the cone, i.e. the central zone of the cornea, becomes cloudy and scarred, a lamellar or full corneal transplantation may be required, which is relatively risky and the quality of vision after surgery is relatively poor.