After corneal degeneration, patients may experience symptoms such as photophobia, tearing, pain, blurred vision, and vision loss. Corneal degeneration is defined as degenerative changes and decreased function of corneal tissue caused by certain pre-existing conditions. There are many classifications of corneal degeneration, such as corneal senile ring, band keratopathy, limbal corneal degeneration, corneal lipoatrophy, and macrovesicular keratopathy. In general, corneal degeneration progresses relatively slowly and symptoms may not be apparent at first. However, as the disease progresses, both eyes may gradually become inflamed, and symptoms such as congestion and pain may occur. When corneal degeneration is more serious, it may also cause vision loss, blurred vision, photophobia and other symptoms, and may even lead to the risk of blindness. It is recommended that when symptoms of corneal degeneration appear, patients should go to the hospital in a timely manner to clarify the cause of the disease and seek treatment as soon as possible.