Fig. 2. Human vitreous dissection. A. Vitreous from a 9-month-old child. The sclera, choroid, and retina were dissected off the vitreous body, which remains attached to the anterior segment. A band of gray tissue can be seen posterior to the ora serrata. This is neural retina that was firmly adherent to the vitreous base and could not be dissected. The vitreous body is solid and although situated on a surgical towel exposed to room air maintains its shape; because of the young age of the donor, the vitreous is almost entirely gel. B. Human vitreous dissected of the sclera, choroid, and retina and attached to the anterior segment. The specimen is mounted on a Lucite frame using sutures through the limbus and then immersed in a Lucite chamber containing an isotonic, physiologic solution. This maintains the turgescence of the vitreous and avoids collapse and artifactual distortion of the vitreous structure. (A Courtesy of the New England Eye Bank, Boston, MA. B from Sebag J, Balazs EA: Pathogenesis of C.M.E: Anatomic consideration of vitreo-retinal adhesions. Surv Ophthalmol 28[Suppl]:493, 1984.)