To the Editor.
—To improve results in some complex cases of retinal detachment, a vitreous supplementation may be required. Many substances have been used for this purpose, some absorbable and others nonabsorbable.Absorbable materials, like saline solution and air are replaced by the naturally produced intraocular fluids. Nonabsorbable materials, for example silicone oil, are retained permanently and may cause problems related to the ocular tissue tolerance and the physical characteristics of the material.If a permanent effect is desired, the material used should have the following properties (1) it must push the retina against the choroid rapidly and give continuous support to the detached retina; (2) traction exerted by preretinal organization should be counteracted and the formation of additional vitreoretinal adhesions prevented; (3) transport of metabolites inside the vitreous cavity should be unhindered; and (4) the material should have a specific gravity, a refractive index and a rigidity approximating that
Daniele S, Refojo MF, SCHEPENS CL. GLYCERYL METHACRYLATE HYDROGEL AS A POSSIBLE VITREOUS IMPLANT. Arch Ophthalmol. 1967;78(6):822. doi:10.1001/archopht.1967.00980030824021
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