Many serious eye conditions are caused by problems with the vitreous. Vitreous gel, a clear substance that fills the eye cavity, is attached to the retina. Jelly-like in consistency, it contains strong strands of protein. With age, vitreous gel slowly liquefies, allowing protein strands to clump together. This condition often creates liquid-filled pockets containing particles that look like specks or lines in the vision. Many patients view these particles as floaters, which often become more noticeable with age.