Cross section of vitreous anatomy. A, Cross section diagram of the eye with emphasis on the anatomical features of the vitreous. The vitreous is most firmly attached to the retina at the vitreous base, and it also has adhesions at the optic nerve, along vessels, at the fovea, and to the posterior lens capsule. A prominent area of liquefaction of the premacular vitreous gel is called the premacular bursa, or precortical vitreous pocket. B, Swept-source optical coherence tomography (SS-OCT) image of posterior vitreous and macula region demonstrates the signal void in the vitreous cavity in front of the macula that represents the premacular bursa (arrowheads). Note also the very thick macular choroid and photoreceptor disruption in the central macula, extending nasally.