The vitreous is a homogeneous,transparent gel-like structure composed of water(98％),collagen type Ⅱ and hyaluronic acid.Collagen fibers are arranged in a three-dimensional grid-like structure to which hyaluronic acid is attached.Hyaluronic acid has moisturizing properties.When young,collagen and hyaluronic acid are evenly distributed to maintain the transparency of the vitreous.With age changes or pathological damage,the composition of the vitreous changes,the collagen framework gradually collapses,the vitreous liquefies,damages its transparency,and floaters occur.The main methods for the treatment of floaters include observation and follow-up,Nd∶YAG laser and vitrectomy.This article reviews the etiology of floaters and the advantages and limitations of Nd∶YAG laser therapy for floaters.
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