In the PCV eyes, the levels of IL-1α, IL-1β, IL-2, IL-4, IL-8, IL-10, and VEGF were significantly higher than the control eyes, and in the typical AMD eyes, the levels of IL-1α, IL-2, IL-8, IL-10, IL-17, and VEGF were also significantly higher. Here, IL4 is linked to age-related macular degeneration.