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The main functions of the vitreous are to transmit light to the retina, and to exert enough pressure to keep the retinal layers tightly pressed together. This pressure helps maintain the round shape of the eye so the lens can focus sharp images on the retina. The vitreous is very different from the aqueous humor.
Posterior vitreous detachment, sometime simply called vitreous detachment, occurs when the vitreous, a gel-like substance attached to the retina in the back of the eye, shrinks and pulls away from the retina.By itself, vitreous detachment does not seriously affect your vision and usually does not require any treatment.owever, vitreous detachment may make you more susceptible to retinal detachment and macular hole formation, which are serious conditions that are known to cause visual loss. Healthy vitreous comprises 80% of the eyeball volume. Vitreous is extraordinarily clear and changes consistency throughout life.