Vitreous liquefaction and induced traction on the retina

Vitreous humor, which fills most part of the eye's interior, is a gel-like substance in the young healthy man. With aging, it undergoes a liquefaction process that usually leads to vitreous separation from the retina, which is called Posterior Vitreous Detachment (PVD). Sites of strong adherence between the vitreous and the retina may prevent a complete detachment. In such circumstances the adherent vitreous collagen fibers may pull so hard as to produce a retinal break, triggering a retinal detachment. This rupture mechanism may possibly be induced, or amplified, by eye natural rotations. According to (Sebag, 1989): How to best evaluate the presence or absence of vitreous traction and how to quantitate the degree of vitreous traction is presently not known.