Detached retina Health Dictionary

See EYE.... retina

Blockage of an artery supplying blood to the retina, most commonly due to thrombosis or embolism, The disorder can result in permanent blindness or loss of part of the field of vision, depending on the artery affected and whether or not the condition can be treated quickly enough.... retinal artery occlusion

Separation of the retina from the outer layers at the back of the eye. Detachment may follow an eye injury but usually occurs spontaneously. It is usually preceded by a retinal tear, and is more common in highly myopic (shortsighted) people and in people who have had cataract surgery.

The detachment is painless. The first symptom is either bright flashes of light at the edge of the field of vision, accompanied by floaters, or a black “drape” obscuring vision.

Urgent treatment is required and usually involves surgical repair of the underlying tear. If the macula (site of central vision) has not been detached, the results can be excellent.... retinal detachment

Blockage of a vein carrying blood away from the retina.

It usually results from thrombosis in the affected vein, and is more common in people who have glaucoma.

Retinal vein occlusion may cause visual disturbances, glaucoma, or blindness.... retinal vein occlusion

See EYE, DISORDERS OF.... retina, disorders of

See: BLEEDING. ... eyes  - retinal haemorrhage

Bleeding into the retina from 1 or more blood vessels, due to diabetes mellitus, hypertension, or retinal vein occlusion. When the macula

(site of central vision) is involved, vision is severely impaired.

Peripheral haemorrhages may be detected only when the eye is examined with an ophthalmoscope.... retinal haemorrhage

The development of a split in the retina, usually caused by degeneration.

A tear is more common in people with severe myopia.

A retinal tear may also be caused by a severe eye injury.

Retinal detachment usually follows a retinal tear.

If a retinal tear is found before there is any detachment, the hole is sealed by laser treatment or cryopexy (application of extreme cold).... retinal tear

(ARN) severe inflammation and necrosis of the retina associated with inflammation and blockage of retinal blood vessels, haemorrhage and death of retinal tissue, and retinal detachment. It may affect both eyes (bilateral acute retinal necrosis, BARN), and visual prognosis is poor. ARN is thought to be due to viral infection.... acute retinal necrosis

swelling of the retina, usually resulting from blunt trauma to the eye. The swelling usually resolves over a few days.... commotio retinae

n. (pl. retinacula) a thickened band of tissue that serves to hold various tissues in place. For example, flexor retinacula are found over the flexor tendons in the wrist and ankle.... retinaculum

1. (retinene) n. the aldehyde of retinol (*vitamin A). See also rhodopsin. 2. adj. see retina.... retinal

separation of the retina from its insertion at the ora serrata (the anterior margin of the retina, lying just posterior to the ciliary body). This acts as a retinal tear and causes a *retinal detachment.... retinal dialysis