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What Is a Vitreous Cloud?

An opacity, or condensed area of collagen fibers and cellular debris, suspended within the vitreous humor (the clear, gel-like substance that fills the space between the lens and the retina).

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What Is a Vitreous Cloud?

An opacity, or condensed area of collagen fibers and cellular debris, suspended within the vitreous humor (the clear, gel-like substance that fills the space between the lens and the retina).

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Symptom

Clinically, vitreous clouds are perceived by the patient as floaters, shapes, strands, or webs that drift across the field of vision, particularly visible against a bright, uniform background (like a blue sky).

Pathology

Most commonly caused by age-related degeneration (syneresis), where the vitreous gel liquefies and collagen fibers clump together (posterior vitreous detachment).

Seriousness

While usually harmless, a sudden increase in floaters or the addition of light flashes can signal a more serious event, such as a retinal tear or detachment.

Are floaters permanent?

Yes, once formed, the opacities are generally permanent, but the brain often learns to ignore (adapt to) the presence of the floaters over time.

What is 'vitrectomy'?

A surgical procedure to remove the vitreous humor, which is sometimes performed to remove visually significant, dense vitreous opacities (clouds) that severely interfere with vision.

Does the size of the floater correlate with the size of the cloud?

No. The perceived size of the floater is highly magnified by its proximity to the light source (the retina), making a small cloud appear large and distinct.