Corneal cloudiness is often difficult to go down with medication. Corneal cloudiness is often caused by trauma, inflammation, chemical injury, etc., resulting in infiltration of the stroma layer of the cornea, or even deeper layers. When the condition is controlled, the infiltration of the cornea is gradually absorbed, then the surrounding corneal epithelium will regenerate and repair, thus covering the ulcerated surface and forming a corneal scar. Therefore, it is a proliferative connective tissue, which is difficult to treat by drugs. If the corneal cloud flap is located in the pupil area and has a greater impact on vision, surgical treatment such as corneal transplantation can be considered. It is recommended that patients seek medical attention in a timely manner, and depending on the impact of corneal cloudiness on vision, clinical observation or surgical treatment such as corneal transplantation should be taken.