What is the name of the pigmented line that represents the leading edge of a pterygium?

The leading edge of a pterygium is characterized by the presence of Stocker's line, which is a pigmented line that indicates the anterior margin of the pterygium as it extends onto the corneal surface. This line arises from the accumulation of melanin and is often darker in color compared to the surrounding tissues.

Stocker's line is indicative of the chronicity of the pterygium and may vary in pigmentation depending on the individual. Recognizing Stocker's line is important in clinical practice for diagnosing and evaluating pterygia. It helps in understanding the progression of the condition and aids in determining the appropriate management, whether it be monitoring, surgical intervention, or addressing associated symptoms.

Other lines, like Fleischer's ring, are related to different ocular conditions, such as keratoconus, while Kruckenberg's line is associated with the corneal changes seen in Wilson's disease. The Hudson-Stahli line is an age-related corneal opacity that does not relate to pterygium. Understanding the significance of Stocker's line is essential for optometrists in assessing ocular surface changes and providing adequate management.