Cone cornea is an eye disease characterized by a thinning of the central cornea that protrudes forward in a conical shape, often resulting in highly irregular myopia and astigmatism, and with the development of the disease, the cornea further protrudes and thins, causing a rupture of the posterior elastic layer of the cornea, which has a certain toughness like the “water barrier”, and the water in the eye enters the cornea, resulting in corneal edema and clouding. The water inside the eye enters the cornea and causes edema and clouding, resulting in a significant loss of vision that cannot be corrected with lenses. When the rupture is repaired by its own tissue, it leaves a scar that affects vision. The disease usually starts at the age of 10-20, usually in both eyes, and the cause is unknown. Initially, a patient with early cone keratoconus often shows subtle changes in vision, and as the disease progresses, vision will fluctuate, with frequent changes in the prescription of myopic lenses and corneal contact lenses. This occurs because the thinner portion of the cornea shows pontic outgrowth in the eye due to the action of intraocular pressure. As the disease progresses, light enters the eye and becomes distorted, or irregularly astigmatic. The outer part of the eye begins to puff out, causing it to look conical. The onset of cone can occur at any age from 8-45 years old. In most cases, the disease changes slowly over a period of more than 10 years, usually stabilizing in the 30s and 40s. How is cone cornea treated? 1, wearing glasses or corneal contact lenses: for patients with mild cases, optometry and glasses to improve vision. Patients whose vision cannot be corrected by frame glasses can wear rigid contact lenses (RGP), but rigid contact lenses do not have a definite effect on delaying corneal proptosis. 2.Keratoconus transplantation: It is suitable for patients whose corneas are obviously thinning in anterior protrusion and whose vision cannot be corrected. Early and middle cone cornea, the central cornea without turbidity, can be considered for lamellar corneal transplantation, the cornea has formed a scar patients need to perform penetrating corneal transplantation.