Introduction: Retinal detachment results in visual loss and requires surgical treatment. The shear stress induced during eye movement by the vitreous on the retina can damage the retina. The following filling of the subretinal space with liquefied vitreous induce the detachment of the retina. Changes in the vitreous viscoelasticity impact on the shear stress. Up to now, the viscoelasticity of t...

Recent studies have evaluated many methods of reducing vitreous mass and minimizing vitreous loss at lens extraction (Robbins and Galin, I969; Robbins, Blumenthal, and Galin, I970; Galin, Robbins, and Obstbaum, 1970). In the rabbit, it is clear that hyperosmolar solutions are effective, while digital massage is not (Obstbaum, Robbins, Best, and Galin, 1970). It has been accepted that correctly-...

Macular hole (MA) is a significant cause of visual acuity (VA) loss in patients over 50 years in our environment. The traction by the vitreous, particularly the posterior hyaloids, on the retina surface plays a leading role in the etiopathogeny of MA. The collagen fibers that comprise the posterior vitreous are firmly joined to the macula and connecting to the internal limiting membrane by mean...

BACKGROUND A 1 year retrospective analysis of 650 patients, who underwent a posterior capsulorhexis on their intact capsules, was performed to examine the incidence of complications, their aetiologies, and the outcome. METHODS Data were analysed on 32 patients with complicated capsulorhexis for type of surgery, preoperative and postoperative factors, and relative risk factors for vitreous iss...

Most retinal detachments are preceded by a posterior vitreous detachment (PVD), which causes traction on the retina and, potentially, a retinal tear. The liquefied vitreous can then seep under the retina, causing it to detach. Retinal detachments may initially be localised, but without treatment they may progress and lead to irreversible vision loss. Early recognition and prompt referral are th...

PURPOSE Previous studies from this laboratory revealed that vitreous insulin-like growth factor biological activity increases in diabetes and that this change can precede the onset of proliferative diabetic retinopathy. The goal of this study was to characterize this phenomenon in an animal model of alloxan-induced diabetes. METHODS Swine made diabetic with intravenous alloxan were euthanized...

Using pigmented rabbits, two fluorophotometric methods for measuring aqueous flow were compared. A corneal depot of dye was used to measure aqueous flow in one eye of each rabbit while the vitreous depot method of Johnson and Maurice was used to measure aqueous flow over the same period in the fellow eye. After intravenous administration of acetazolamide or mannitol, during the first hour after...