A surgical tool called the Wilder Lacrimal Dilator Size 3 with Heavy Taper is used to widen the lacrimal duct during eye surgeries. Its heavy 19 mm taper makes it easier to restore normal tear flow when the lacrimal drainage system is obstructed. The dilator is usually made of titanium, which ensures longevity and ease of sterilizing, and measures 100 mm (3.9 inches) in total length.