Inflammation of one or all portions of the uveal tract.

Primary or spontaneous detachment of the retina occurs due to underlying ocular disease and often involves the vitreous as well as the retina. The precipitating event is formation of a retinal tear or hole, which permits fluid to accumulate under the sensory layers of the retina and creates an intraretinal cleavage that destroys the neurosensory process of visual reception. Vitreoretinal degeneration and tear formation are painless phenomena, and in most cases, significant vitreoretinal pathology is found only after detachment of the retina starts to cause loss of vision or visual field. Without surgical intervention, retinal detachment will almost inevitably lead to total blindness (summary by McNiel and McPherson, 1971).

Bleeding within the vitreous compartment of the eye.

Ocular abnormality characterized by premature degeneration of the vitreous and the retina that may be associated with increased risk of retinal detachment.

Blindness is the condition of lacking visual perception defined as a profound reduction in visual perception. On the 6m visual acuity scale, blindness is defined as less than 3/60. On the 20ft visual acuity scale, blindness is defined as less than 20/400. On the decimal visual acuity scale, blindness is defined as less than 0.05. Blindness is typically characterized by a visual field of no greater than 10 degrees in radius around central fixation.

A type of retinal neovascularization that affects the periphery of the retina.

Any abnormality of the electrical responses of various cell types in the retina as measured by electroretinography.

A type of retinal neovascularization that affects the posterior pole of the retina.