What is a common indicator of anterior non-necrotizing diffuse scleritis?

The selection of "presence of inflammation" as the common indicator of anterior non-necrotizing diffuse scleritis is particularly valid because this condition is characterized by inflammation of the sclera without necrosis of the tissue. In this type of scleritis, there is often a prominent inflammatory response, which can involve pain, redness, and swelling in the affected area. The inflammation typically manifests as a diffused, bluish discoloration of the sclera and may be associated with other systemic conditions.

In contrast to other options, while severe ocular pain is indeed a symptom of scleritis, it is not exclusive to anterior non-necrotizing diffuse scleritis and can be present in other types of scleritis as well. Additionally, the risk for perforation is more associated with necrotizing forms of scleritis, which involve tissue destruction. The choice indicating no associated ocular inflammation contradicts the very definition of scleritis, which is fundamentally an inflammatory condition of the sclera. Thus, the presence of inflammation is the most accurate choice in identifying anterior non-necrotizing diffuse scleritis.