Which environmental factor can lead to eye irritation?

Air conditioning is a significant environmental factor that can lead to eye irritation. The process of cooling air often involves removing moisture, which can reduce humidity levels in indoor environments. When humidity is low, it can cause the tear film that protects and lubricates the eyes to evaporate more quickly. This can lead to symptoms of dryness and irritation, making individuals feel uncomfortable.

In contrast, low humidity, while indeed a factor that might contribute to dry eyes, is most often a direct consequence of air conditioning rather than an independent cause in this context. Bright lighting could result in discomfort or temporary visual disturbances, but it is not commonly associated with persistent eye irritation in the same manner as reduced humidity from air conditioning. Therefore, focusing on the specific implications of air conditioning makes it the more accurate choice for the context of eye irritation.