What is vitreous opacity in the eye?

Vitreous opacity, also known as floaters, is a pathological change occurring in the vitreous body. Below are its main causes and manifestations: Causes: 1. Congenital factors: Residual embryonic tissue may lead to congenital opacities. 2. Pathological changes: Bleeding or exudates from conditions such as hypertension, diabetes, and uveitis invading the vitreous, or vitreous degeneration in elderly individuals with high myopia, can all cause vitreous liquefaction and cloudiness. 3. Trauma and foreign bodies: Ocular trauma or retained intraocular foreign bodies may also trigger opacities. 4. Eye diseases: Retinal vascular diseases, vitreous inflammation, and other ocular disorders are also common causes. Manifestations: Mild cases may only perceive floating dark spots in front of the eyes, resembling flying insects. More pronounced opacities may be accompanied by decreased vision; fundus examination reveals floating particles resembling dust, coarse fibers, or clumped strands. In severe cases, the fundus may become entirely obscured, appearing completely black.