Corneal senile ring is a lipid-like deposition in the stroma of the peripheral part of the cornea, and pathohistologically the lipid-like deposition is mainly in the area near the anterior and posterior elastic lamina.50-60 year olds because 60% have senile ring, and almost all of them over the age of 80 years old have senile ring, and both eyes are onset, the turbidity is in the upper and lower part of the cornea at first, and it develops gradually into a ring. The ring is white in color, usually about 1 mm wide, with a clear outer border and a blurred inner border, separated from the corneal rim by a clear corneal band. Occasionally, it can appear as a congenital anomaly in young adults, also known as youthful ring. In this case, the lesion is often confined to a portion of the corneal rim without forming a ring and is not associated with dyslipidemia, and the senile ring is usually a degenerative change with a genetic predisposition. However, they can sometimes be a manifestation of hyperlipoproteinemia, especially increased LDL or serum cholesterol, especially when present in patients under 40 years of age, and can be used as a reference for the diagnosis of atherosclerosis, which does not require treatment.