What are Arlt's lines indicative of?

Arlt's lines are indicative of late signs of trachoma, which is an infectious disease caused by the bacterium Chlamydia trachomatis. These lines are characterized by fibrous bands that form on the conjunctiva due to the scarring that occurs as a result of the chronic inflammation associated with trachoma.

In the context of trachoma, the presence of Arlt's lines suggests that the disease has progressed beyond the initial stages, where redness and irritation might be more prominent, into a stage where significant scarring and structural changes in the eye have taken place. This condition can ultimately lead to complications such as corneal opacity and vision loss if left untreated. Understanding the significance of Arlt's lines is crucial for healthcare providers in diagnosing and managing patients with trachoma, especially in areas where the disease is endemic.