1.What is corneal dystrophy? Corneal dystrophy is not a general sense of dystrophy, but a class of lesions that originate in the cornea and have pathological histological characteristics. Generally not accompanied by systemic diseases, there is a certain degree of heredity, patients often in the 20 years of age before the eyes gradually appear unexplained vision loss, some patients will have a certain degree of eye pain, irritation symptoms. Common corneal dystrophies are: corneal epithelial basement membrane dystrophy, granular corneal dystrophy, lattice corneal dystrophy, and Fuchs corneal endothelial dystrophy. Early without treatment or only symptomatic treatment, serious impact on vision when feasible corneal transplantation. 2.What is cone cornea? What are the manifestations of patients? Cone cornea is an eye disease characterized by the thinning and protrusion of the central cornea in a conical shape, often resulting in highly irregular myopia and astigmatism, with the development of the disease, the cornea further protrudes and thins, causing the rupture of the posterior elastic layer of the cornea, which has a certain toughness like the “water barrier”, so that the water in the eye enters the cornea and the cornea The water inside the eye enters the cornea and causes edema and clouding, resulting in significant vision loss that cannot be corrected with frame lenses. When the rupture is repaired by its own tissue, it leaves a scar that affects vision. The disease mostly starts at the age of 10-20, usually in both eyes, the cause is unknown. 3. How is cone cornea diagnosed? A clear cone cornea is easy to diagnose. When the appearance and slit lamp is not typical, early diagnosis is more difficult. The most effective method is corneal topography. Other methods include Placido disc, corneal curvature meter, retinal microscopy, etc. 4.How to treat cone cornea? ① Wearing glasses or corneal contact lenses: For patients with mild cases, optometry and glasses are used to improve visual acuity. Patients whose vision cannot be corrected by frame glasses can wear rigid contact lenses (RGP). Rigid contact lenses have a certain control effect on delaying corneal proptosis. ②Keratoconus transplantation: It is suitable for patients with significant anterior corneal protrusion thinning and whose vision cannot be corrected. Early and middle cone cornea, central cornea without clouding, can be considered for lamellar corneal transplantation, patients whose cornea has formed a scar need to perform penetrating corneal transplantation. At present, there are fewer corneal donor sources in China and need to register in advance. 5.What are the characteristics of chemical injuries to the eye surface? Because the cornea, conjunctiva and other ocular surface tissues are in direct contact with the outside world, if you are not careful, chemical substances such as acids and bases can easily splash into the eye and cause chemical injuries. General acidic substances make the burned tissue denaturation deposition, the formation of coagulative necrosis, can prevent the acid to continue to deep tissue penetration; and alkaline substances because of the burned tissue saponification, often to deep tissue penetration rapidly, resulting in more serious consequences. 6.How to deal with the early stage of chemical injury of the eye surface? Should immediately use a large amount of clean water nearby to fully flush, should pay attention to the rotation of the eyeball, turn the upper and lower eyelids so that all directions and the dome to get fully flushed, completely remove foreign body residue, and then go to the hospital as soon as possible, so as to do the next step of treatment.