Core Insights - Jiangsu Danyang is the world's largest lens production base, producing over 400 million pairs of lenses annually, accounting for approximately half of the global total output [1] - The local lens manufacturing companies have developed a self-researched 5-degree aberration testing device, breaking the 25-degree interval testing system that has been in use since 1843 [1] - The shift from bulk production to a refined, differentiated, and customized lens market is highlighted by the introduction of the new testing device [1] Industry Performance - In the first four months of 2025, Jiangsu Danyang's eyewear export value reached 1.716 billion yuan, representing a year-on-year growth of 4.3% [1] - The products are exported to over 150 countries and regions, indicating a strong international market presence [1]