noun. the jelly-like substance that fills the middle of the eye. Also called the vitreous humor.


The vitreous is like a clear gel that fills the body of our eyes. It's full of tiny fibers that attach to your retina (back of your eye) which keeps the retina properly attached connected to the back wall of your eye. Some disorders in the vitreous may include:

● Floaters

● Vitreous Degeneration



noun. tiny clumps of gel or cells inside the vitreous that fills your eye

You usually notice floaters when looking at something plain, like a blank wall or a blue sky.


As we age, our vitreous starts to thicken or shrink. Sometimes clumps or strands form in the vitreous. If the vitreous pulls away from the back of the eye, it is called posterior vitreous detachment. Floaters usually happen with posterior vitreous detachment. They are not serious, and they tend to fade and become less noticeable over time. Severe floaters can be removed by surgery, but this has risks and is seldom necessary or recommended.

You are more likely to get floaters if you:

  • are nearsighted (you need glasses to see far away)

  • have had surgery for cataracts

  • have had inflammation (swelling) inside the eye


vitreous degeneration

noun. a change that occurs in the vitreous humor (or vitreous fluid) in the eye, as the vitreous humor changes from a thick vitreous gel to a thin liquid substance

Normally, the vitreous humor is a transparent gel that helps with clarity of vision and maintaining the shape of the eye. As we age, the vitreous gel may start to shrink and become more of a liquid consistency; it will no longer be able to fill the space of the eye, and the vitreous humor can detach from the retina, which is the light-sensing nerve layer at the back of the eye. The fibers connecting the vitreous humor to the retina will start to pull away as this happens. 

Initially, with mild vitreous degeneration, the most common symptoms are vitreous floaters, which look like small cobwebs in the field of vision. 

With some individuals who experience significant degeneration, a posterior vitreous detachment (PVD) can happen. A posterior vitreous detachment is the complete detachment of the vitreous humor from the retina. Risk factors for PVD include aging, advanced myopia, recent eye surgery, and eye trauma. Although PVD rarely leads to vision loss, it can lead to flashes of light and an increase in floaters.

A vitreous hemorrhage (blood in the vitreous cavity) can happen when a blood vessel tears away with posterior vitreous detachment. A vitreous hemorrhage will give the individual flashes and floaters in the field of vision. Some vision loss may occur due to the presence of blood in the visual field.

Other complications that can occur with vitreous degeneration include retinal tears or a retinal detachment. A torn retina can occur as the fibers on the vitreous humor pull away from the retina. A sudden increase in the amount of flashes and floaters can be indicative of a retinal tear or detachment. If the torn retina is not treated promptly, a complete retinal detachment can occur.