Vitreous

A Novel Artificial Vitreous Substitute – Foldable Capsular Vitreous Body

The natural vitreous is a transparent, gelatinoid structure occupying four-fifths of the volume of the eye. It has a thin, membrane-like structure corresponding to the vitreous cortex that extends from the ora serrata to the posterior pole.1 It is somewhat spherical but slightly flattened meridionally, and it has a cup-shaped depression in its anterior side. It consists of about 99% water by we...

Posterior hyperplastic primary vitreous.

A fundus picture of posterior hyperplastic primary vitreous based on a study of 14 cases is described. Its definition, in spite of pleomorphic manifestations, could be useful for its differentiation from other conditions affecting children's eyes and presumed to be caused by parasitic, inflammatory, fibroplastic, or genetically transmitted processes.

Fixed vitreous cyst.

Modeling vitreous silica bilayers

Theoretical modeling is presented for a freestanding vitreous silica bilayer which has recently been synthesized and characterized experimentally in landmark work. While such two-dimensional continuous random covalent networks should likely occur on energetic grounds, no synthetic pathway had been discovered previously. Here the bilayer is modeled using a computer assembly procedure initiated f...

Vitreous surgery simulator.

OBJECTIVE To reduce the surgical risks to patients and expose surgeons to surgical experience and complications, we have developed a practical system of vitreous surgery using virtual-reality technology. METHODS The system is composed of high-resolution color stereo binoculars, haptic devices, foot switches, and a high-speed graphics computer. To simulate vitreous surgery, we created several ...